NTT物性科学基礎研究所 フロンティア機能物性研究部
ナノメカニクス研究グループ
岡本 創

International Conference & Workshop

156. Feedback in Quantum Mechanics 2023, Nov. 27- Dec. 1, 2023, Okinawa, Japan
        H. Yamaguchi, D. Hatanaka, R. Ohta, M. Asano, and H. Okamoto
       “Hybrid phononic devices for classical and quantum technologies” (Invited)

155. Feedback in Quantum Mechanics 2023, Nov. 27- Dec. 1, 2023, Okinawa, Japan
        M. Asano, H. Okamoto, and H. Yamaguchi
       “Entropy production in two-mode continuous nonlinear feedback”

154. 28th International Conference on Optical Fiber Sensors (OFS28), Nov. 20-24, 2023, Hamamatsu, Japan
        M. Asano, H. Yamaguchi, and H. Okamoto
       “A highly sensitive optomechanical liquid level meter based on a twin-microbottle resonator”

153. 36th International Microprocesses and Nanotechnology Conference (NMC2023), Nov. 14-17 ,2023, Hokkaido, Japan
        M. Kurosu, D. Hatanaka, H. Yamaguchi, Y. Taniyasu, and H. Okamoto
       “Demonstration of an acoustic resonator exceeding 40 GHz”

152. 28th International Conference on Statistical Physics (STATPHYS2023), Aug. 7-11, 2023, Tokyo, Japan
        M. Asano, H. Okamoto, and H. Yamaguchi
       “Entropy production with continuous nonlinear feedback in quadrature amplitudes”

151. XVII Conference on Phonon Scattering in Condensed Matter (Phonons2023), July 2-7, 2023, Paris, France
        H. Yamaguchi, D. Hatanaka, R. Ohta, M. Asano, and H. Okamoto
       “Novel directions in hybrid phononic devices” (Plenary)

150. 6th International Conference on Phononic Crystals/Metamaterials/Metasurfaces, Phonon Transport,
        Topological Phononics (Phononics 2023), June 12-16, 2023, Manchester, UK
        D. Hatanaka, H. Takeshita, M. Kataoka, M. Misawa, H. Okamoto, H. Yamaguchi, and K. Tsuruta
       “Control of ultrahigh frequency phonon transport in valley topological ring resonator-waveguide systems”

149. Frontiers of Nanomechanical Systems (FNS) Workshop 2023, June 6-9, 2023, Delft, The Netherlands
        M. Asano, H. Yamaguchi, and H. Okamoto
       “Cavity optomechanical liquid prober using a twin-microbottle resonator” (Invited)

148. Frontiers of Nanomechanical Systems (FNS) Workshop 2023, June 6-9, 2023, Delft, The Netherlands
        D. Hatanaka, M. Asano, H. Okamoto, and H. Yamaguchi
       “Acoustic spin pumping and the back-action in a phononic crystal cavity”

147. The 2023 CLEO Conference, May 7-12, 2023, San Jose, USA
        R. Ohta, G. Lelu, X. Xu, T. Inaba, K. Hitachi, Y. Taniyasu, H. Sanada, A. Ishizawa, T. Tawara, K. Oguri, H. Yamaguchi,
        and H. Okamoto
       “Acoustic control of optical excitation of rare-earth ions”

146. International Conference on Nano-photonics and Nano-optoelectronics (ICNN2023), Apr. 19-21, 2023,
        Yokohama, Japan
        R. Ohta, G. Lelu, X. Xu, T. Inaba, K. Hitachi, Y. Taniyasu, H. Sanada, A. Ishizawa, T. Tawara, K. Oguri, H. Yamaguchi,
        and H. Okamoto
       “Observation of the multiple acoustic phonon sidebands in erbium ions” (Invited)

145. International Workshop on Hybrid Quantum Systems and Interfaces (QND2023), Mar. 8-10, 2023, Las Vegas, USA
        H. Yamaguchi, D. Hatanaka, R. Ohta, M. Asano, and H. Okamoto
       “Novel acoustic hybrid devices -from magnon to rare-earth two level systems-” (Invited)

144. 35th International Microprocesses and Nanotechnology Conference (MNC2022), Nov. 8-11, 2022, Tokushima, Japan
        M. Kurosu, D. Hatanaka, R. Ota, K. Takase, H. Yamaguchi, Y. Taniyasu, and H. Okamoto
       “High-overtone bulk acoustic resonator with epitaxial AlN layer grown on n-SiC”

143. International Workshop on Nanomechanical Sensing (NMC2022), Aug. 9-12, 2022, Bangalore, India (Hybrid)
        M. Asano, H. Yamaguchi, and H. Okamoto
       “An optomechanical prober in liquid with twin microbottle resonators”

142. Conference on Lasers and Electro-Optics Pacific Rim 2022 (CLEO-PR 2022), July 31–Aug. 5, 2022, Sapporo, Japan
        R. Ohta, T. Hatomura, M. Hiraishi, V. M. Bastidas, X. Xu, K. Oguri, W. J. Munro, and H. Okamoto
       “Compression of the inhomogeneous broadening of ensemble rare-earth ions using a mechanical resonance”

141. The Compound Semiconductor Week 2022 (CSW2022), June 1-3, 2022 (Online)
        W. Tomita, S. Sasaki, M. Asano, K. Tateno, H. Okamoto, and H. Yamaguchi
       “Vectorial frequency control of two orthogonal vibration modes in a double-gate nanowire mechanical resonator device”

140. International Symposium on Novel maTerials and quantum Technologies (ISNTT2021), Dec. 14-17, 2021 (Online)
        R. Ohta, L. Herpin, V. M. Bastidas, T. Tawara, H. Yamaguchi, and H. Okamoto
       “Micromechanical control of the optical resonances of erbium ions”

139. International Symposium on Novel maTerials and quantum Technologies (ISNTT2021), Dec. 14-17, 2021 (Online)
        M. Kurosu, D. Hatanaka, H. Okamoto, and H. Yamaguchi
       “Coupled nonlinear silicon mechanical resonators driven by piezoelectric transducers”

138. International Symposium on Novel maTerials and quantum Technologies (ISNTT2021), Dec. 14-17, 2021 (Online)
        D. Hatanaka, M. Asano, H. Okamoto, Y. Kunihashi, H. Sanada, and H. Yamaguchi
       “Cavity-enhanced coherent magnon-phonon transduction with surface acoustic waves”

137. International Symposium on Novel maTerials and quantum Technologies (ISNTT2021), Dec. 14-17, 2021 (Online)
        M. Asano, H. Okamoto, and H. Yamaguchi
       “Entropy pumping under nonlinear measurement and feedback in a micromechanical resonator”

136. 20th International Conference on Modulated Semiconductor Structures (MSS-20), Oct. 31-Nov.5, 2021 (Online)
        H. Yamaguchi, W. Tomita, S. Sasaki, K. Tateno, and H. Okamoto
        “Dual-mode and dual-gate nanowire electromechanical resonator devices”

135. 34th International Microprocesses and Nanotechnology Conference (MNC2021), Oct. 26-29, 2021 (Online)
        M. Kurosu, D. Hatanaka, H. Okamoto, and H. Yamaguchi
       “Fabrication and characterization of coupled silicon phononic resonators with piezoelectric transducers”

134. 4th Workshop on Optomechanics and Brillouin Scattering (WOMBAT2021), June 15-17 2021 (Online)
        M. Asano, G. Zhang, T. Tawara, H. Yamaguchi, and H. Okamoto
       “Dispersive and dissipative cavity optomechanical coupling in a semiconductor nanowire”

133. 4th Workshop on Optomechanics and Brillouin Scattering (WOMBAT2021), June 15-17, 2021 (Online)
        R. Ohta, L. Herpin, V. M. Bastidas, T. Tawara, H. Yamaguchi, and H. Okamoto
       “Strain-mediated interaction between erbium ions and a mechanical resonator:
        structural dependence of the opto-mechanical coupling rate”

132. The 2021 CLEO Conference, May 9-14, 2021 (Online)
        R. Ohta, L. Herpin, V. M. Bastidas, T. Tawara, H. Yamaguchi, and H. Okamoto
       “Strain-mediated control of rare-earth ions toward a highly-coherent hybrid opto-mechanical system”

131. The 47nd International Symposium on Compound Semiconductors (ISCS2021), May 9-13, 2021 (Online)
        W. Tomita, S. Sasaki, K. Tateno, H. Okamoto, and H. Yamaguchi
       “Double-gate nanowire electromechanical resonator devices”

130. Frontiers of Nanomechanical Systems (FNS) Workshop 2021, Jan. 19-21, 2021 (Online)
        H. Okamoto, R. Schilling, H. Schutz, V. Sudhir, D. J. Wilson, H. Yamaguchi, and T. J. Kippenberg
       “A near-field cavity optoelectromechanical charge sensor”

129. Frontiers of Nanomechanical Systems (FNS) Workshop 2021, Jan. 19-21, 2021 (Online)
        D. Hatanaka, Y. Kunihashi, H. Sanada, H. Okamoto, and H. Yamaguchi
       “Cavity-enhanced spin-wave resonance with a surface acoustic-wave resonator”

128. Frontiers of Nanomechanical Systems (FNS) Workshop 2021, Jan. 19-21, 2021 (Online)
        R. Ohta, L. Herpin, V. M. Bastidas, T. Tawara, H. Yamaguchi, and H. Okamoto
       “Strain-mediated interaction between a micromechanical resonator and rare-earth ions”

127. International Conference on Solid State Devices and Materials (SSDM2020), Sep. 27-30, 2020 (Online)
        M. Asano, G. Zhang, T. Tawara, H. Yamaguchi, and H. Okamoto
       “Near-field cavity optomechanics in an InP/InAs heterostructured nanowire with a silica optical microsphere cavity”

126. International Symposium on Nanoscale Transport and phoTonics (ISNTT2019), Nov. 18-22, 2019, Atsugi, Japan
        R. Ohta, H. Okamoto, T. Tawara, H. Gotoh, and H. Yamaguchi
       “Micromechanical control of exciton lifetime”

125. The 21st International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures
        (EDISON21), 14-19 July, 2019, Nara, Japan
        R.Ohta, H. Okamoto, T. Tawara, H. Gotoh, and H. Yamaguchi
       “Strain-induced lifetime modulation of GaAs excitons with a micromechanical resonator”

124. International Symposium on Hybrid Quantum Systems 2019 (HQS2019), 26-27 June, 2019, Ottawa, Canada
        R.Ohta, H. Okamoto, T. Tawara, H. Gotoh, and H. Yamaguchi
       “Mechanical control of localized excitons: strained coupling between dark and bright states and
        mechanical control of exciton lifetime” (Invited)

123. 2019 Frontiers in Quantum Materials and Devices Workshop (FQMD2019), 27-28 May 2019, Tokyo, Japan
        R.Ohta, H. Okamoto, T. Tawara, H. Gotoh, and H. Yamaguchi
       “Mechanical control of localized excitons”

122. 2019 Frontiers in Quantum Materials and Devices Workshop (FQMD2019), 27-28 May 2019, Tokyo, Japan
        M. Asano, R. Ohta, T. Aihara, T. Tsuchizawa, H. Okamoto, and H. Yamaguchi
       “Probing Schwinger angular momentum in a two-mode mechanical system”

121. The 46th International Symposium on Compound Semiconductors (ISCS), 19-23 May, 2019, Nara, Japan
        W. Tomita, S. Sasaki, K. Tateno, H. Okamoto, and H. Yamaguchi
       “Novel Fabrication Technique of Suspended Nanowire Devices for Nanomechanical Applications”

120. Frontiers of Nanomechanical Systems (FNS) Workshop 2019, 10-14 February, 2019, Palm Springs, USA
        R.Ohta, H. Okamoto, T. Tawara, H. Gotoh, and H. Yamaguchi
       “Mechanical control of bound excitons: strained coupling of dark and bright states” (Invited)

119. France-Japan Bilateral Workshop on Hybrid Quantum Systems, Oct.1-2, 2018, Paris, France
        H. Yamaguchi, R. Ohta, and H. Okamoto
       “Carrier mediated optomechanics” (Invited)

118. SPIE Optics+Photonics 2018, Aug.11-15, 2018, San Diego, USA
        H. Yamaguchi, R. Ohta, and H. Okamoto
       “Carrier mediated optoemechanical coupling in a GaAs/AlGaAs heterostructure cantilever” (Invited)

117. International Conference on the Physics of Semiconductors (ICPS2018), July 29-Aug.3, 2018, Montpellier, France
        R. Ohta, H. Okamoto, T. Tawara, H. Gotoh, and H. Yamaguchi
       “Mechanical control of the coupling between dark and bright bound excitons”

116. Gordon Research Conference (Mechanical Systems In The Quantum Regime), Feb. 25-Mar. 2, 2018, Ventura, USA
        R. Ohta, H. Okamoto, T. Tawara, H. Gotoh, and H. Yamaguchi
       “Strain-induced coupling of dark and bright excitons in a mechanical resonator”

115. Frontiers of Circuit QED and Optoemchanics (CQO2018), Feb. 12-14, 2018, Klosterneuburg, Austria
        M. Asano, R. Ohta, T. Yamamoto, H. Okamoto, and H. Yamaguchi
       “An evanescently-coupled silica microbottle and GaAs electromechanical resonator”

114. International Symposium on Nanoscale Transport and phoTonics (ISNTT2017), Nov. 14-17, 2017, Atsugi, Japan
        M. Asano, R. Ohta, H. Okamoto, T. Tawara, H. Gotoh, and H. Yamaguchi
       “Evanescently-coupled optomechanical device with a GaAs optical disk-mechanical beam structure”

113. International Symposium on Nanoscale Transport and phoTonics (ISNTT2017), Nov. 14-17, 2017, Atsugi, Japan
        R. Ohta, H. Okamoto, T. Tawara, H. Gotoh, and H. Yamaguchi
       “Coherent coupling of dark and bright excitons with vibrational strain”

112. International Symposium on Hybrid Quantum Systems (HQS2017), Sep.10-13, 2017, Miyagi-Zao, Japan
        R. Ohta, H. Okamoto, T. Tawara, H. Gotoh, and H. Yamaguchi
       “Dynamic coupling control of dark and bright bound excitons in a mechanical resonator”

111. Frontiers of Nanomechanical Systems (FNS2017), Feb. 5-10, 2017, La Thuile, Itary
        R. Ohta, H. Okamoto, and H. Yamaguchi
       “Optical detection of the mechanical motion using photoluminescence from AlGaAs/GaAs heterostructure”

110. Frontiers of Nanomechanical Systems (FNS2017), Feb. 5-10, 2017, La Thuile, Itary
        H. Yamaguchi, I. Mahboob, H. Okamoto, and D. Hatanaka
       “Parametric coupling and correlated fluctuation in multimode electromechanical resonators” (Invited)

109. The 43rd International Symposium on Compound Semiconductors (ISCS2016), June 26-30, 2016, Toyama, Japan
        I. Mahboob, H. Okamoto, and H. Yamaguchi
       “Simulating the Ising Hamiltonian with phonons”

108. The 43rd International Symposium on Compound Semiconductors (ISCS2016), June 26-30, 2016, Toyama, Japan
        R. Ohta, H. Okamoto, D. Hatanaka, and H. Yamaguchi
       “Multi-mode optical feedback control of GaAs mechanical resonators”

107. Frontiers in Quantum Materials and Devices Workshop (FQMD2016), June 13-14, 2016, Wako, Japan
        H. Okamoto, T. Watanabe, R. Ohta, K. Onomitsu, H. Gotoh, T. Sogawa, and H. Yamaguchi
       “Excitonic optomechanics in a GaAs system” (Invited)

106. Frontiers in Quantum Materials and Devices Workshop (FQMD2016), June 13-14, 2016, Wako, Japan
        R. Ohta, H. Okamoto, D. Hatanaka, and H. Yamaguchi
       “Simultaneous feedback control in coupled mechanical resonators”

105. Quantum Acoustic –Surface acoustic waves meets sold state qubits-, May 17-20, 2016, Mainz, Germany
        H. Yamaguchi, H. Okamoto, D. Hatanaka, Y. Okazaki, and I. Mahboob
       “Piezoelectric phonon manipulation in electromechanical resonators and waveguides” (Invited)

104. The 11th Annual IEEE International Conference on Nano/Micro Engineered and Molecular Systems (IEEE-NEMS 2016),
        Apr. 17-20, 2016, Matsushima, Japan
        H. Yamaguchi, I. Mahboob, H. Okamoto, and D. Hatanaka
       “Phonon confinement, transport, and piezoelectric manipulation in nonlinear electromechanical resonators” (Invited)

103. Gordon Research Conference (Mechanical Systems In The Quantum Regime), Mar. 6-11, 2016, Ventura, USA
        H. Okamoto, R. Schilling, H. Schutz, V. Sudhir, D.J. Wilson, T.J. Kippenberg, and H. Yamaguchi
       “A strongly-coupled lambda-type micromechanical system”

102. Gordon Research Conference (Mechanical Systems In The Quantum Regime), Mar. 6-11, 2016, Ventura, USA
        R. Ohta, H. Okamoto, D. Hatanaka, and H. Yamaguchi
       “Multi-mode feedback control of hexagonally connected mechanical resonators”

101. 2015 Materials Research Society (MRS) Fall Meeting, Nov. 29-Dec. 4, 2015, Boston, USA
        H. Yamaguchi, D. Hatanaka, I. Mahboob, and H. Okamoto
       “Phonon confinement, transport, and piezoelectric manipulation in semiconductor micromechanical structures”
        (Invited)

100. The 5th International Workshoop on Epitaxial Growth and Fundamental Properties of Semiconductor Nanostructures,
        Sep. 6-11, 2015, Hsinchu, Taiwan
        H. Yamaguchi, D. Hatanaka, I. Mahboob, and H. Okamoto
       “III-V semiconductor micro/nanomechanical resonators” (Invited)

99. The 17th International Conference on Modulated Semiconductor Structures, July 26-31, 2015, Sendai, Japan
       R. Ohta, H. Okamoto, R. Hey, K. J. Friedland, and H. Yamaguchi
      “Optically induced room-temperature strong coupling in mechanical resonators”

98. The 17th International Conference on Modulated Semiconductor Structures, July 26-31, 2015, Sendai, Japan
       I. Mahboob, H. Okamoto, and H. Yamaguchi
      “Correlated phonon pair generation in an electromechanical resonator” (Invited)

97. The Spin Mechanics 3 Workshop, June 22- 26, 2015, Munich, Germany
       H. Okamoto, T. Watanabe, R. Ohta, K. Onomitsu, H. Gotoh, T. Sogawa, and H. Yamaguchi
      “Optomechanical coupling via excitons in semiconductor hetrostructures”

96. The 3rd International Conference on Phononic Crystals, Metamaterials, Phonon Transport & Phonon Coupling,
       May 31–June 5, 2015, Paris, France
       H. Okamoto, T. Watanabe, R. Ohta, K. Onomitsu, H. Gotoh, T. Sogawa, and H. Yamaguchi
      “Excitonic optomechanical coupling in gallium arsenide”

95. The American Physical Society March Meeting, Mar. 2-6, 2015, San Antonio, USA
       I. Mahboob, H. Okamoto, and H. Yamaguchi
      “Two-mode thermo-mechanical noise squeezing in an electromechanical resonator”

94. School & Discussion Meeting on Frontiers in Light-Matter Interactions, Dec. 19-22, 2014, Kolkata, India
       H. Yamaguchi, I. Mahboob, H. Okamoto, and D. Hatanaka
      “Nonlinear phonon dynamics in electromechanical resonators” (Invited)

93. International Electron Devices and Materials Symposium 2014, Nov. 20-21, 2014, Hualien, Taiwan
       H. Yamaguchi, D. Hatanaka, I. Mahboob, and H. Okamoto
      “Opto/electromechanical resonators based on GaAs/AlGaAs heterostructures” (Invited)

92. The 10th European Conference on Silicon Carbide and Related Materials, Sep. 21-25, 2014, Grenoble, France
       K. Sato, K. Adachi, H. Okamoto, H. Yamaguchi, T. Kimoto, and J. Suda
      “High-temperature operation of electrostatically-excited single-crystalline 4H-SiC microcantilever resonators”

91. The 6th IEEE International Nanoelectronics Conference 2014, July 28-31, 2014, Sapporo, Japan
       H. Yamaguchi, D. Hatanaka, H. Okamoto, and I. Mahboob
      “Nonlinear electromechanical resonators ~From phonon lasing operation to nanomechanical processors~” (Invited)

90. International Seminar on Nano Mechanical Systems, June 30-July 2, 2014, Paris, France
       I. Mahboob, H. Okamoto, and H. Yamaguchi
      “A correlated electromechanical system” (Invited)

89. International Workshop on Spin Mechanics 2, June 21-24, 2014, Sendai, Japan
       H. Yamaguchi, D. Hatanaka, H. Okamoto, and I. Mahboob
      “Nonlinear phonon dynamics in coupled electromechanical resonators” (Invited, Tutorial)

88. 2014 IEEE International Frequency Control Symposium, May 19-22, 2014, Taipei, Taiwan
       H. Yamaguchi, I. Mahboob, and H. Okamoto
      “Nonlinear dynamics and all mechanical phonon lasing in electromechanical resonators” (Invited)

87. The 41th International Symposium on Compound Semiconductors, May 11-15, 2014, Montpellier, France
       H. Okamoto, I. Mahboob, K. Onomitsu, and H. Yamaguchi
      “Rapid switching of the oscillation amplitude in paired GaAs micromechanical resonators”

86. Gordon Research Conferences (Mechanical Systems In The Quantum Regime), March 9-13, 2014, Ventura, USA
       H. Okamoto, A. Taspinar I. Mahboob, K. Onomitsu, and H. Yamaguchi
      “Higher-order dynamic coupling of two mechanical resonators induced by parametric mode mixing”

85. International Symposium on Advanced Nanodevices and Nanotechnology 2013, Dec. 8-13, 2013, Hawaii, USA
       H. Yamaguchi, I. Mahboob, H. Okamoto, and Y. Okazaki
      “Coherent manipulation and lasing operation in micromechanical phonon cavities” (Invited)

84. 2013 Materials Research Society Fall Meeting, Dec. 1-6, 2013, Boston, MA, USA
       M. Takamura, H. Okamoto, K. Furukawa, S. Tanabe, H. Yamaguchi, and H. Hibino
      “Energy dissipation in graphene resonators”

83. International Symposium on Nanoscale Transport and Technology 2013, Nov. 26-29, Atsugi, Japan
       H. Okamoto, I. Mahboob, and H. Yamaguchi
      “Coherently coupled nanomechanical oscillators”

82. International Conference on Silicon Carbide and Related Materials 2013, Sep. 29- Oct. 4, 2013, Miyazaki, Japan
       K. Sato, K. Adachi, H. Okamoto, H. Yamaguchi, T. Kimoto, and J. Suda
      “Fabrication of electrostatically actuated 4H-SiC microcantilever resonators by using n/p/n epitaxial structures and
       doping-selective electrochemical etching”

81. International Conference on Silicon Carbide and Related Materials 2013, Sep. 29-Oct. 4, 2013, Miyazaki, Japan
       K. Adachi, H. Okamoto, H. Yamaguchi, T. Kimoto, and J. Suda
      “Single-crystalline 4H-SiC microcantilever resonators with a 10 times higher quality factor than 3C-SiC”

80. CeNS Workshop 2013 “Nanosciences: Great Adventures on Small Scales”, Sep. 16-20, 2013, Venice, Italy
       H. Yamaguchi, H. Okamoto, T. Watanabe, and Y. Okazaki
      “Mechanical systems coupled to semiconductor quantum structures” (Invited)

79. Frontiers of Nanomechanics, Sep. 9-13, 2013, Trieste, Italy
       H. Yamaguchi, I. Mahboob, and H. Okamoto
      “Coherent manipulation and phonon lasing in electromechanical resonators” (Invited)

78. The 10th Topical Workshop on Heterostructure Microelectronics, Sep. 2-5, 2013, Hakodate, Japan
       H. Yamaguchi, I. Mahboob, and H. Okamoto
      “Nonlinear phonon dynamics in GaAs/AlGaAs electromechanical resonators” (Invited)

77. The 18th International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures,
       July 22-26, 2013, Matsue, Japan
       T. Watanabe, H. Okamoto, K. Onomitsu, and H. Yamaguchi
      “Mechanical characterization of photo-excited carrier dynamics in AlGaAs/GaAs modulation-doped heterostructures”

76. The 40th International Symposium on Compound Semiconductors, May 19-23, 2013, Kobe, Japan
       H. Okamoto, A. Taspinar, I. Mahboob, and H. Yamaguchi
      “Ultra-strong parametric coupling between two GaAs/AlGaAs micromechanical resonators”

75. The 10th International Focus Workshop on Spin Mechanics, Feb. 25-26, 2013, Mito, Japan
       H. Yamaguchi, I. Mahboob, and H. Okamoto
      “Strong modal-coupling and parametric control in electromechanical resonators” (Invited)

74. The 10th RIEC International Workshop on Spintronics, Jan. 15-16, 2013, Sendai, Japan
       H. Yamaguchi, H. Okamoto, and I. Mahboob
      “Strong coupling and time-domain control in electromechanical parametric resonators” (Invited)

73. 2012 Workshop on Innovative Nanoscale Devices and Systems, Dec. 2-7, 2012, Hawaii, USA
       H. Okamoto, A. Gourgout, A. Taspinar, I. Mahboob, K. Onomitsu, and H. Yamaguchi
      “Coherent oscillations in a mechanical system”

72. Material Science Week 2012, Nov. 25- Dec. 1, 2012, Sendai, Japan
       H. Yamaguchi, I. Mahboob, H. Okamoto, and K. Onomitsu
      “Semiconductor heterostructures for novel electromechanical devices” (Invited)

71. The 25th International Microprocesses and Nanotechnology Conference, Oct. 30-Nov. 2, 2012, Kobe, Japan
       T. Watanabe, H. Okamoto, K. Onomitsu, and H. Yamaguchi
      “Piezoelectric optical-absorption spectroscopy of a GaAs/AlGaAs heterostructure using cantilever mechanical resonance”

70. 2012 International Conference on Solid State Devices and Materials, Sep. 24-28, 2012, Kyoto, Japan
       M. Takamura, K. Furukawa, H. Okamoto, S. Tanabe, H. Yamaguchi, and H. Hibino
      “Epitaxial graphene resonators obtained by electrochemical etching”

69. The 17th International Conference on Molecular Beam Epitaxy, Sep. 24-28, 2012, Nara, Japan
       H. Okamoto, A. Gourgout, I. Mahboob, K. Onomitsu, and H. Yamaguchi
      “Parametric mode mixing in coupled GaAs electromechanical oscillators”

68. The 17th International Conference on Molecular Beam Epitaxy, Sep. 24-28, 2012, Nara, Japan
       T. Watanabe, H. Okamoto, K. Onomitsu, H. Gotoh, T. Sogawa, and H. Yamaguchi
      “Mechanical Q control of a GaAs/AlGaAs cantilever using optical absorption at exciton state”

67. The 17th International Conference on Molecular Beam Epitaxy, Sep 24-28, 2012, Nara, Japan
       D. Hatanaka, I. Mahboob, H. Okamoto, K. Onomitsu, and H. Yamaguchi
      “A GaAs/AlGaAs-based membrane electromechanical resonator”

66. The 39th International Symposium on Compound Semiconductors, Aug 27-29, 2012, Santa Barbara, USA
       H. Yamaguchi, H. Okamoto, and I. Mahboob
      “Parametric mode-mixing in structurally-coupled mechanical resonators”

65. The 31th International Conference on the Physics of Semiconductors, July 30-Aug 3, 2012, Zurich, Switzerland
       T. Watanabe H. Okamoto, K. Onomitsu, H. Gotoh, T. Sogawa, and H. Yamaguchi
      “Cavity-free laser cooling of a GaAs/AlGaAs micromechanical resonator using optical absorption at exciton states”

64. The 31th International Conference on the Physics of Semiconductors, July 30-Aug 3, 2012, Zurich, Switzerland
       K.-J. Friedland, D. K. Maude, H. Okamoto, H. Yamaguchi, M. H. Fauzi, and Y. Hirayama
      “Electron gyroscope with high-mobility electrons on a cylindrical surface”

63. The 31th International Conference on the Physics of Semiconductors, July 30-Aug 3, 2012, Zurich, Switzerland
       H. Yamaguchi, I. Mahboob, and H. Okamoto
      “Parametric mode-coupling and its application to signal processing in GaAs/AlGaAs electromechanical resonators”

62. NEMS-BARCELONA Workshop, May 28-June 1, 2012, Barcelona, Spain
       H. Yamaguchi, I. Mahboob, and H. Okamoto
      “Piezoelectric parametric resonators: Inter-mode parametric coupling”

61. Gordon Research Conferences (Mechanical Systems In The Quantum Regime), March 4-8, 2012, Galveston, USA
       H. Okamoto, A. Gourgout, I. Mahboob, K. Onomitsu, and H. Yamaguchi
      “Parametrically coupled micromechanical oscillators”

60. Gordon Research Conferences (Mechanical Systems In The Quantum Regime), March 4-8, 2012, Galveston, USA
       H. Yamaguchi, H. Okamoto, S. Ishihara, and Y. Hirayama
      “Electron-mediated mechanical back-action”

59. Gordon Research Conferences (Mechanical Systems In The Quantum Regime), March 4-8, 2012, Galveston, USA
       T. Watanabe, H. Okamoto, K. Onomitsu, H. Gotoh, T. Sogawa, and H. Yamaguchi
      “Cavity-free laser cooling of a micromechanical resonator using optical absorption at exciton states”

58. International Symposium on Advanced Nanodevices and Nanotechnology, Dec. 4-9, 2011, Hawaii, USA
       H. Yamaguchi, H. Okamoto, and I. Mahboob
      “Pi-pulse control of micro/nanomechanical oscillation using parametric mode mixing”

57. International Workshop on Quantum Nanostructures and Nanoelectronics, Oct. 3-4, 2011, Tokyo, Japan
       T. Watanabe, H. Okamoto, K. Onomitsu, H. Gotoh, T. Sogawa, and H. Yamaguchi
      “Huge laser-wavelength dependence of the thermo-mechanical vibration of a GaAs/AlGaAs heterostructured cantilever”

56. 2011 International Conference on Solid State Devices and Materials, Sep.28-30, 2011, Nagoya, Japan
       T. Watanabe, H. Okamoto, K. Onomitsu, H. Gotoh, T. Sogawa, and H. Yamaguchi
      “Micromechanical characterization of optical absorption in a GaAs/AlGaAs heterostructure”

55. 17th International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostrucutres,
       Aug. 7-12, 2011, Santa Barbara, USA
       H. Okamoto, D. Ito, T. Watanabe, K. Onomitsu, H. Sanada, H. Gotoh, T. Sogawa, and H. Yamaguchi
      “Carrier-mediated opto-mechanical coupling in GaAs micromechanical resonators” (Invited)

54. 2011 International Seminar on Nanomechanical Systems, July 4-5, 2011, Toulouse, France
       H. Yamaguchi, I. Mahboob, H. Okamoto, and K. Onomitsu
      “Heterostructure-based parametric resonator and its applications” (Invited)

53. The 38th International Symposium on Compound Semiconductors, May 22-26, 2011, Berlin, Germany
       H. Okamoto, I. Mahboob, K. Onomitsu, and H. Yamaguchi
      “A micromechanical two-level system”

52. International Symposium on Nanoscale Transport and Technology, Jan.11-14, 2011, Atsugi, Japan
       K.-J. Friedland, H. Okamoto, H. Yamaguchi, R. Hey, and A. Riedel
      “High-mobility electrons on a cylindrical surface –Quantum transport and coupling with vibration modes
       due to induced magnetic moments-”

51. International Symposium on Nanoscale Transport and Technology, Jan.11-14, 2011, Atsugi, Japan
       H. Okamoto, C. Y. Chang, K. Onomitsu, E. Y. Chang, and H. Yamaguchi
      “Nonlinear nanomechanical resonance of coupled GaAs oscillators”

50. Frontiers in Nanoscale Science and Technology Workshop, Jan. 5-7, 2011, Wako-shi, Japan
       H. Okamoto, D. Ito, K. Onomitsu, H. Sanada, H. Gotoh, T. Sogawa, and H. Yamaguchi
      “Carrier-mediated opto-mechanical coupling in GaAs cantilevers” (Invited)

49. 2010 Workshop on Innovative Devices and Systems, Dec. 5-10, 2010, Hawaii, USA
       H. Okamoto, C. Y. Chang, K. Onomitsu, E. Y. Chang, and H. Yamaguchi
      “Piezoelectric tuning of coupled nanomechanical oscillators based on GaAs/AlGaAs heterostructures”

48. 2010 Workshop on Innovative Devices and Systems, Dec. 5-10, 2010, Hawaii, USA
       K.-J. Friedland, H. Okamoto, R. Hey, and A. Riedel
      “High-mobility electrons on a cylindrical surface –Quantum transport and coupling with vibration modes
       due to induced magnetic moments-”

47. 2010 International Conference on Solid State Devices and Materials, Sep. 22-24, 2010, Tokyo, Japan
       H. Okamoto, C. Y. Chang, K. Onomitsu, E. Y. Chang, and H. Yamaguchi
      “Piezoelectric control of coupled vibration in elastically coupled nanomechanical oscillators”

46. Workshop on Nano-Opto-Electro-Mechanical Systems Approaching the Quantum Regime, Sep. 6-10, 2010, Trieste, Italy
       H. Okamoto, C. Y. Chang, K. Onomitsu, E. Y. Chang, and H. Yamaguchi
      “Piezoelectric control of coupled vibration in elastically coupled nanomechanical oscillators”

45. International symposium on advanced functionality with three-dimensionally controlled quantum structures,
       Aug. 30-31, 2010, Potsdam, Germany
       K.-J. Friedland, A. Siddiki, H. Okamoto, R. Hey, A. Riedel, and D. K. Maude
      “High-mobility electrons on cylindrical surfaces –quantum transport and coupling with vibration modes-”

44. International symposium on advanced functionality with three-dimensionally controlled quantum structures,
       Aug. 30-31, 2010, Potsdam, Germany
       W. Izumida, H. Okamoto, H. Yamaguchi, and Y. Hirayama
      “Curvature dependence of vibrational modes in rolled-up semiconductor layer”

43. International symposium on advanced functionality with three-dimensionally controlled quantum structures,
       Aug. 30-31, 2010, Potsdam, Germany
       H. Yamaguchi, I. Mahboob, and H. Okamoto
      “Microelectromechanical resonators ingtegratiing GaAs/AlGaAs two-dimensional electron systems”

42. International symposium on advanced functionality with three-dimensionally controlled quantum structures,
       Aug. 30-31, 2010, Potsdam, Germany
       H. Okamoto, C. Y. Chang, K. Onomitsu, E. Y. Chang, and H. Yamaguchi
      “Linear and nonlinear resonance of frequency tunable coupled micromechanical oscillators”

41. The 16th International Conference on Molecular Beam Epitaxy, Aug. 22-27, 2010, Berlin, Germany
       H. Yamaguchi, H. Okamoto, Y. Maruta, S. Ishihara, and Y. Hirayama
      “Mechanical to electrical power transduction using a micromechanical 2DES cantilever”

40. 2010 Asia-Pacific Workshop on Fundamentals and Applications of Advanced Semiconductor Devices,
       June 30–July 2, 2010, Tokyo, Japan
       H. Yamaguchi, I. Mahboob, H. Okamoto, and K. Onomitsu
      “Challenge for the electromechanical logic systems using compound semiconductor heterostructures” (Invited)

39. The 7th International Workshop on Nanomechanical Cantilever Sensors, May 26-28, 2010, Banff, Canada
       H. Okamoto, N. Kitajima, K. Onomitsu, R. Kometani, S. Warisawa, S. Ishihara, and H. Yamaguchi
      “Sensitive charge detection using perfectly tuned coupled nanomechanical oscillators”

38. Gordon Research Conferences (Mechanical Systems In The Quantum Regime), March 21-26, 2010, Galveston, USA
       H. Okamoto, C. Y. Chang, K. Onomitsu, E. Y. Chang, and H. Yamaguchi
      “Perfect frequency tuning of coupled nanomechanical resonators by piezoelectric effect”

37. Gordon Research Conferences (Mechanical Systems In The Quantum Regime), March 21-26, 2010, Galveston, USA
       K. Onomitsu, I. Mahboob, H. Okamoto, and H. Yamaguchi
      “Spin dynamics characterized using a micromechanical GaMnAs cantilever”

36. International Symposium on Quantum Nanostructures and Spin-related Phenomena, March 9-11, 2010, Tokyo, Japan
       H. Okamoto, N. Kitajima, K. Onomitsu, R. Kometani, S. Warisawa, S. Ishihara, and H. Yamaguchi
      “Frequency tunable coupled nanomechanical resonators and their sensing applications”

35. International Symposium on Quantum Nanostructures and Spin-related Phenomena, March 9-11, 2010, Tokyo, Japan
       H. Okamoto, H. Yamaguchi, W. Izumida, Y. Hirayama, A. Riedel, R. Hey, and K.-J. Friedland
      “Nanomechanical resonances of rolled 2DEG structures”

34. International Symposium on Quantum Nanostructures and Spin-related Phenomena, March 9-11, 2010, Tokyo, Japan
       W. Izumida, H. Okamoto, H. Yamaguchi, and Y. Hirayama
      “Curvature dependence of vibrational modes in rolled-up semiconductor layer”

33. Workshop on Quantum Physics using Superconducting Artificial Atoms and Nanomechanics,
       March 4-5, 2010, Atsugi, Japan
       H. Okamoto
      “Optical control of nanomechanical vibration in GaAs resonators”

32. The 22nd International Microprocesses and Nanotechnology Conference, Nov. 16-19, 2009, Sapporo, Japan
       N. Kitajima, H. Okamoto, T. Kamada, K. Onomitsu, S. Warisawa, S. Ishihara, and H. Yamaguchi
      “High-sensitive charge detection using anti-symmetric vibration in coupled micromechanical resonators”

31. 2009 International Conference on Solid State Devices and Materials, Oct. 7-9, 2009, Sendai, Japan
       H. Okamoto, D. Ito, K. Onomitsu, H. Sanada, H. Gotoh, T. Sogawa, and H. Yamaguchi
      “Carrier-induced dynamic backaction in GaAs mircomechanical resonators”

30. The 14th International Conference on Modulated Semiconductor Structures, July 20-24, 2009, Kobe, Japan
       H. Okamoto, T. Kamada, K. Onomitsu, I. Mahboob, and H. Yamaguchi
      “Tunable coupling of mechanical vibration in GaAs microresonators”

29. International Symposium on Nanoscale Transport and Technology, Jan. 20-23, Atsugi, Japan
       H. Okamoto, D. Ito, K. Onomitsu, H. Sanada, H. Gotoh, T. Sogawa, and H. Yamaguchi
      “Vibration control in GaAs micromechanical resonators by optically induced piezoelectric backaction”

28. International Symposium on Nanoscale Transport and Technology, Jan. 20-23, Atsugi, Japan
       V. K. Singh, K. Yamazaki, T. Tawara, H. Okamoto, and H. Yamaguchi
      “A new angled ion etching method to fabricate a nanostructure and its resonance characteristic”

27. Advanced Functionality with Three-Dimensionally Controlled Nanostructures, Mar. 19, 2008, Berlin, Germany
       H. Okamoto
      “Optical Q-control of a semiconductor micromechanical resonator”

26. Gordon Research Conferences (Mechanical Systems In The Quantum Regime), Feb. 17-22, 2008, Ventura, USA
       H. Okamoto, D. Ito, K. Onomitsu, T. Sogawa, and H. Yamaguchi
      “Optical feedback control in semiconductor-based micromechanical resonators”

25. International Symposium on Advanced Nanodevices and Nanotechnology, Dec. 1-4. 2007, Hawaii, USA
       H. Yamaguchi, I. Mahboob, H. Okamoto, and K. Onomitsu
      “Micromechanical devices for characterizing electron behavior in quantum systems”

24. The 34th International Symposium on Compound Semiconductors, Oct. 15-18, 2007, Kyoto, Japan
       K Onomitsu, I. Mahboob, H. Okamoto, and H. Yamaguchi
      “Magneto-elastic coupling in GaMnAs studied by a micromechanical cantilever”

23. The 34th International Symposium on Compound Semiconductors, Oct. 15-18, 2007, Kyoto, Japan
       H. Okamoto, D. Ito, K. Onomitsu, and H. Yamaguchi
      “Thermoelastic damping in GaAs micromechanical resonators”

22. The15th International Conference on Nonequilibrium Carrier Dynamics in Semiconductors,
       July 23-27, 2007, Tokyo, Japan
       H. Okamoto, D. Ito, K. Onomitsu, and H. Yamaguchi
      “Energy dissipation in a GaAs cantilever controlled by carrier excitation”

21. The 13th International Conference on Modulated Semiconductor Structures, July 15-20, 2007, Genova, Italy
       K. Onomitsu, I. Mahboob, H. Okamoto, and H. Yamaguchi
      “Spin dynamics characterized by using a micromechanical GaMnAs cantilever”

20. International Conference on Nanoelectronics, Nanostructures and Carrier Interactions 2007,
       Feb. 20-23, 2007, Atsugi, Japan
       H. Okamoto, D. Ito, K. Onomitsu, and H. Yamaguchi
      “Temperature-eependent internal friction in a GaAs piezoresistive cantilever”

19. International Conference on Nanoelectronics, Nanostructures and Carrier Interactions 2007,
       Feb. 20-23, 2007, Atsugi, Japan
       H. Yamaguchi, H. Okamoto, S. Miyashita, and Y. Hirayama
      “Piezovolataic effects in a two-dimensional electron system”

18. International Conference on Nanoelectronics, Nanostructures and Carrier Interactions 2007,
       Feb. 20-23, 2007, Atsugi, Japan
       K. Onomitsu, I. Mahboob, H. Okamoto, and H. Yamaguchi
      “Strain-induced modulation of carrier transport properties in GaMnAs”

17. International Conference on Nanoelectronics, Nanostructures and Carrier Interactions 2007,
       Feb. 20-23, 2007, Atsugi, Japan
       F. Xue, Y. D. Wang, C. P. Sun, H. Okamoto, H. Yamaguchi, and K. Semba
      “Controllable coupling between flux qubit and nanomechanical resonator by magnetic field”

16. International Conference on Solid State Devices and Materials 2006, Sep. 12-15, 2006, Yokohama, Japan
       I. Mahboob, H. Okamoto, M. Ueki and H. Yamaguchi
      “Magnetopiezoresistance effects in an InAs/AlGaSb nanomechanical resonator with extremely small power consumption”

15. International Symposium on Compound Semiconductors 2006, Aug. 13-17, 2006, Vancouver, Canada
       I. Mahboob, H. Okamoto, M. Ueki and H. Yamaguchi
      “Nanomechanical resonator with extremely small power consumption”

14. The 28th International Conference on the Physics of Semiconductors, July 24-28, 2006, Vienna, Austria
       H. Yamaguchi, H. Okamoto, S. Miyashita, M. Ueki, and H. Hirayama
      “Mechanically detected electron energy dissipation in two-dimensional electron systems”

13. International Conference on Solid State Devices and Materials 2005, Sep. 13-15, 2005, Kobe, Japan
       H. Okamoto, T. Akazaki, M. Ueki and H. Yamaguchi
      “Superconducting proximity effect on piezoresistance in a superconductor-semiconductor junction”

12. The 12th International Conference on Modulated Semiconductor Structures, July 10-15, 2005, Albuquerque, USA
       H. Okamoto, T. Akazaki, M. Ueki, H. Yamaguchi, and H. Namatsu
      “A piezoresistive cantilever integrating an InAs-based semiconductor-superconductor junction”

11. Materials Research Society Fall Meeting, December 1-5, 2003, Boston, USA
       H. Okamoto, T. Nakanishi, Y. Nagai, T. Yamada, H. Miyazaki, K. Takeda, Y. Furukawa, I. Obataya, H. Mihara, H. Azehara,
       W. Mizutani, K. Hashimoto, H. Yamaguchi, and Y. Hirayama
      “A study of the self-assembling morphology in peptide nanorings and nanotubes”

10. The 104th American Physical Society March Meeting, March 3-7, 2003, Austin, USA
       H. Okamoto, T. Nakanishi, Y. Nagai, M. Kasahara, and K. Takeda
      “Variety of the molecular conformation in peptide nano-rings and nano-tubes”

9. The 103th American Physical Society March Meeting, March 18-22, 2002, Indianapolis, USA
     H. Okamoto, T. Nakanishi, Y. Nagai, K. Takeda, I. Obataya, H. Mihara, H. Azehara, and W. Mizutani
    “Theoretical prediction and AFM observations of the protein nanotube consisting of
     homo-L-alpha-amino acid penta-peptide nanorings”

8. The 103th American Physical Society March Meeting, March 18-22, 2002, Indianapolis, USA
     Y. Nagai, Y. Furukawa, Hajime Okamoto, T. Nakanishi, K. Takeda, I. Obataya, H. Mihara, H. Azehara, and W. Mizutani
    “Stacking manners of hexa- and octa-peptide nanorings in the protein nanotubes”

7. The 4th International Conference on Biological Physics, July 30-August 3, 2001, Kyoto
     H. Okamoto, T. Nakanishi, M. Kasahara, Y. Asari, K. Takeda, I. Obataya, H. Mihara, Y. Suzuki, and W. Mizutani
    “Electronic and molecular structures of protein nanotubes”

6. The 102th American Physical Society March Meeting, March 12-16, 2001, Seattle, USA
     H. Okamoto, T. Nakanishi, M. Kasahara, and K. Takeda
    “Theoretical study on the electronic and molecular structures of novel peptide nanotubes”

5. The 102th American Physical Society March Meeting, March 12-16, 2001, Seattle, USA
     T. Nakanishi, H. Okamoto, M. Kasahara, and K. Takeda
    “Conformational analysis on the molecular structures of polypeptides having L-D and L-L regular sequences”

4. The 25th International Conference on the Physics of Semiconductors, September 17-22, 2000, Osaka, Japan
     H. Okamoto, M. Kasahara, K. Takeda, and K. Shiraishi
    “Theoretical possibility of semiconductive properties in peptide nanotubes”

3. The 101th American Physical Society March Meeting, March 20-24, 2000, Minneapolis, USA
     H. Okamoto, M. Kasahara, K. Takeda, and K. Shiraishi
    “Electronic and molecular structures of peptide nanotubes”

2. The 219th American Chemical Society March Meeting, March 26-30, 2000, San Francisco, USA
     M. Kasahara, H. Okamoto, K. Takeda, and K. Shiraishi
    “Theoretical study on the electronic and molecular structures of peptide nanotubes”

1. The 100th American Physical Society March Meeting, March 20-24, 1999, Atlanta, USA
     H. Okamoto, K. Takeda, and K. Shiraishi
    “Electronic and molecular structures of beta-sheets”