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 Journal
81. “Valley pseudospin polarized evanescent coupling between microwave ring resonator and waveguide
in phononic topological insulators”
D. Hatanaka, H. Takeshita, M. Kataoka, H. Okamoto, K. Tsuruta, and H. Yamaguchi
Nano Letters, Vol. 24, pp. 5570-5577 (2024).
80. “Fiber-type optomechanical array using high-Q microbottle resonators”
M. Asano, H. Yamaguchi, and H. Okamoto
Physical Review Applied, Vol. 21, 024013 (2024).
79. “Observation of acoustically induced dressed states of rare-earth ions”
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
Physical Review Letters, Vol. 132, 036904 (2024).
--> Press Release (Japanese)
76. “Impedance-matched high-overtone bulk acoustic resonator”
M. Kurosu, D. Hatanaka, R. Ohta, H. Yamaguchi, Y. Taniyasu, and H. Okamoto
Applied Physics Letters, Vol. 122, 122201 (2023).
75. “Cavity optomechanical mass sensor in water with sub-femtogram resolution”
M. Asano, H. Yamaguchi, and H. Okamoto
Applied Physics Express, Vol. 16, 032002 (2023).
--> Selected for Spotlights 2023 of Applied Physics Express
73. “Buckling-induced quadratic nonlinearity in silicon phonon waveguide structures”
M. Kurosu, D. Hatanaka, H. Okamoto, and H. Yamaguchi
Japanese Journal of Applied Physics, Vol. 61, SD1025 (2022).
72. “Fabrication of suspended nanowire mechanical devices using inkjet technology”
S. Sasaki, K. Tateno, H. Okamoto, and H. Yamaguchi
NTT Technical Review, Vol. 20, pp.59-64 (2022).
71. “Highly sensitive detection and control of a nanowire mechanical resonator using an optical microcavity”
M. Asano, G. Zhang, H. Yamaguchi, and H. Okamoto
NTT Technical Review, Vol. 20, pp.54-58 (2022).
70. “Development of an optomechanical device with extremely low optical energy loss”
R. Ohta, V. M. Bastidas. H. Yamaguchi, and H. Okamoto
NTT Technical Review, Vol. 20, pp.49-53 (2022).
69. “Double-gate vectorial frequency control in piezoresistive nanowire electromechanical devices”
W. Tomita, S. Sasaki, M. Asano, K. Tateno, H. Okamoto, and H. Yamaguchi
Physical Review Applied, Vol. 17, 044042 (2022).
68. “On-chip coherent transduction between magnons and acoustic phonons in cavity magnomechanics”
D. Hatanaka, M. Asano, H. Okamoto, Y. Kunihashi, H. Sanada, and H. Yamaguchi
Physical Review Applied, Vol. 17, 034024 (2022).
67. “Self-sustained libration regime in nonlinear microelectromechanical devices”
S. Houri, M. Asano, H. Okamoto, and H. Yamaguchi
Physical Review Applied, Vol. 16, 064015 (2021).
65. “Near-field cavity optomechanical coupling in a compound semiconductor nanowire”
M. Asano, G. Zhang, T. Tawara, H. Yamaguchi, and H. Okamoto
Communication Physics, Vol. 3, 230 (2020).
64. “Novel fabrication technique of suspended nanowire devices for nanomechanical applications”
W. Tomita, S. Sasaki, K. Tateno, H. Okamoto, and H. Yamaguchi
Physica Status Solidi b, Vol. 257, 1900401 (2020).
63. “Optically probing Schwinger angular momenta in a micromechanical resonator”
M. Asano, R. Ohta, T. Aihara, T. Tsuchizawa, H. Okamoto, and H. Yamaguchi
Physical Review A, Vol. 100, 053801 (2019).
62. “Strain-induced exciton decomposition and anisotropic lifetime modulation in a GaAs micromechanical resonator”
R. Ohta, H. Okamoto, T. Tawara, H. Gotoh, and H. Yamaguchi
Physical Review B, Vol. 99, 115315 (2019).
--> Editors' Suggestion
61. “An opto-electro-mechancial system based on evanescently-coupled optical microbottle and
electromechanical resonator”
M. Asano, R. Ohta,T. Yamamoto, H. Okamoto, and H. Yamaguchi
Applied Physics Letters, Vol. 112, 201103 (2018).
60. “Dynamic control of the coupling between dark and bright excitons with vibrational strain”
R. Ohta, H. Okamoto, T. Tawara, H. Gotoh, and H. Yamaguchi
Physical Review Letters, Vol. 120, 267401 (2018).
--> Editors' Suggestion
59. “Feedback control of multiple mechanical modes in coupled micromechanical resonators”
R. Ohta, H. Okamoto, and H. Yamaguchi
Applied Physics Letters, Vol. 110, 053106 (2017).
58. “Energy dissipation in graphene mechanical resonators with and without free edges”
M. Takamura, H. Okamoto, K. Furukawa, H. Yamaguchi, and H. Hibino
Micromachines, Vol. 7, 158 (2016).
57. “Enhanced visibility of two-mode thermal squeezed states via degenerate parametric amplification and resonance”
I. Mahboob, H. Okamoto, and H. Yamaguchi
New Journal of Physics, Vol. 18, 083009 (2016).
56. “An electromechanical Ising Hamiltonian”
I. Mahboob, H. Okamoto, and H. Yamaguchi
Science Advances, Vol. 2, e1600236 (2016).
55. “A strongly coupled Lambda-type micromechanical system”
H. Okamoto, R. Schilling, H. Schütz, V. Sudhir, D. J. Wilson, H. Yamaguchi, and T. J. Kippenberg
Applied Physics Letters, Vol. 108, 153105 (2016).
54. “Cavity-less on-chip optomechanics using excitonic transitions in semiconductor heterostructures”
H. Okamoto, T. Watanabe, R. Ohta, K. Onomitsu, H. Gotoh, T. Sogawa, and H. Yamaguchi
Nature Communications, Vol. 6, 8478 (2015).
--> Press Release (Japanese)
53. “Optically induced strong intermodal coupling in mechanical resonators at room temperature”
R. Ohta, H. Okamoto, R. Hey, K. J. Friedland, and H. Yamaguchi
Applied Physics Letters, Vol. 107, 091906 (2015).
51. “High-temperature operation of electrostatically-excited single-crystalline 4H-SiC microcantilever resonators”
K. Sato, K. Adachi, H. Okamoto, H. Yamaguchi, T. Kimoto, and J. Suda
Materials Science Forum, Vol. 821-823, pp.914-918 (2015).
50. “Two-mode thermal-noise squeezing in an electromechanical resonator”
I. Mahboob, H. Okamoto, K. Onomitsu, and H. Yamaguchi
Physical Review Letters, Vol. 113, 167203 (2014).
49. “Rapid switching in high-Q mechanical resonators”
H. Okamoto, I. Mahboob, K. Onomitsu, and H. Yamaguchi
Applied Physics Letters, Vol. 105, 083114 (2014).
48. “Energy dissipation in edged and edgeless graphene mechanical resonators”
M. Takamura, H. Okamoto, K. Furukawa, H. Yamaguchi, and H. Hibino
Journal of Applied Physics, Vol. 116, 064304 (2014).
46. “Nonlinear electromechanical resonators ~From phonon lasing operation to nanomechanical processors~”
H. Yamaguchi, D. Hatanaka, I. Mahboob, and H. Okamoto
IEEE conference proceedings of IEEE-INEC (2014), DOI:10.1109/INEC.2014.7460416
45. “Mechanical resonance characteristics of a cylindrical semiconductor heterostructure containing
a high-mobility two-dimensional electron gas”
H. Okamoto, W. Izumida, Y. Hirayama, H. Yamaguchi, A. Riedel, and K.-J. Friedland
Physical Review B, Vol. 89, 245304 (2014).
44. “Fabrication of electrostatically actuated 4H-SiC microcantilever resonators by using n/p/n epitaxial structures and
doping-selective electrochemical etching”
K. Sato, K. Adachi, H. Okamoto, H. Yamaguchi, T. Kimoto, and J. Suda
Materials Science Forum, Vol. 778-780, pp.780-783 (2014).
43. “Coherent phonon manipulation in coupled mechanical resonators”
H. Okamoto, A. Gourgout, C.-Y. Chang, K. Onomitsu, I. Mahboob, E. Y. Chang, and H. Yamaguchi
Nature Physics, Vol. 9, pp.480-484 (2013).
--> Picked up by News & Views in Nature Physics, Vol. 9, pp.462-463 (2013), “Spinning oscillators”
--> Picked up by 2Physics, “Coherently Manipulating Nanomechanical Oscillators”
42. “Single-crystalline 4H-SiC micro cantilevers with a high quality factor”
K. Adachi, N. Watanabe, H. Okamoto, H. Yamaguchi, T. Kimoto, and J. Suda
Sensors and Actuators A: Physical, Vol. 197, pp.122-125 (2013).
41. “Ferromagnetic-induced component in piezoresistance of GaMnAs”
K. Onomitsu, I. Mahboob, H. Okamoto, Y. Krockenberger, and H. Yamaguchi
Physical Review B, Vol. 87, 060410(R) (2013).
40. “Epitaxial trilayer graphene mechanical resonators obtained by electrochemical etching combined
with hydrogen intercalation”
M. Takamura, K. Furukawa, H. Okamoto, S. Tanabe, H. Yamaguchi, and H. Hibino
Japanese Journal of Applied Physics, Vol. 52, 04CH01 (2013).
39. “An electromechanical membrane resonators”
D. Hatanaka, I. Mahboob, H. Okamoto, K. Onomitsu, and H. Yamaguchi
Applied Physics Letters, Vol. 101, 063102 (2012).
38. “Optomechanical photoabsorption spectroscopy of exciton states in GaAs”
T. Watanabe, H. Okamoto, K. Onomitsu, H. Gotoh, T. Sogawa, and H. Yamaguchi
Applied Physics Letters, Vol. 101, 082107 (2012).
--> Picked up by News & Views in Nature Photonics, Vol. 6, 721-722 (2012), “Probing optical transitions”
37. “Phonon-cavity electromechanics”
I. Mahboob, K. Nishiguchi, H. Okamoto, and H. Yamaguchi
Nature Physics, Vol. 8, pp.387-392 (2012).
36. “Mechanical vibration of a cylindrically rolled-up cantilever shell in microelectromechanical and
nanoelectromechanical systems”
W. Izumida, Y. Hirayama, H. Okamoto, H. Yamaguchi, and K.-J. Friedland
Physical Review B, Vol. 85, 075313 (2012).
35. “Coherent control of micro/nanomechanical oscillation using parametric mode mixing”
H. Yamaguchi, H. Okamoto, and I. Mahboob
Applied Physics Express, Vol. 5, 014001 (2012).
34. “Motion detection of a micromechanical cantilever through magneto-piezovoltage in two-dimensional electron systems”
H. Yamaguchi, H. Okamoto, S. Ishihara, and Y. Hirayama
Applied Physics Letters, Vol. 100, 012106 (2012).
33. “Carrier-mediated opto-mechanical coupling in GaAs cantilevers”
H. Okamoto, D. Ito, T. Watanabe, K. Onomitsu, H. Sanada, H. Gotoh, T. Sogawa, and H. Yamaguchi
Physical Review B, Vol. 84, 014305 (2011).
31. “Vibration amplification, damping, and self-oscillations in micromechanical resonators induced by
opto-mechanical coupling through carrier excitation”
H. Okamoto, D. Ito, K. Onomitsu, H. Sanada, H. Gotoh, T. Sogawa, and H. Yamaguchi
Physical Review Letters, Vol. 106, 036801 (2011).
30. “High-sensitivity charge detection using anti-symmetric vibration in coupled micromechanical oscillators”
H. Okamoto, N. Kitajima, K. Onomitsu, R. Kometani, S. Warisawa, S. Ishihara, and H. Yamaguchi
Applied Physics Letters, Vol. 98, 014103 (2011).
29. “Tunable coupling of mechanical vibration in GaAs micro-resonators”
H. Okamoto, T. Kamada, K. Onomitsu, I. Mahboob, and H. Yamaguchi
Physica E, Vol. 42. (2010) 2849.
28. “Optical tuning of coupled micromechanical resonators”
H. Okamoto, T. Kamada, K. Onomitsu, I. Mahboob, and H. Yamaguchi
Applied Physics Express, Vol. 2, No. 6 (2009) 062202.
27. “Fabrication of nanomechanical structures from bulk-GaAs using angled ion etching”
V. K. Singh, K. Yamazaki, T. Tawara, H. Okamoto, and H. Yamaguchi
Applied Physics Express, Vol. 2, No. 6 (2009) 065001.
26. “Controlling quality factor in micromechanical resonators by carrier excitation”
H. Okamoto, D. Ito, K. Onomitsu, T. Sogawa, and H. Yamaguchi
Applied Physics Express, Vol. 2, No. 3 (2009) 035001.
24. “Molecular dynamical approach to the conformational transition in peptide nanorings and nanotubes”
M. Teranishi, H. Okamoto, K. Takeda, K. Nomura, A. Nakano, R. K. Kalia, P. Vashishta, and F. Shimojo
The Journal of Physical Chemistry B, Vol. 113, No. 5, (2009) pp.1473-1484.
22. “Mechanically detected field-induced Mn spin rotation in GaMnAs”
K. Onomitsu, I. Mahboob, H. Okamoto, and H. Yamaguchi
Physica Status Solidi C, Vol. 5, No. 9 (2008) pp.2893-2895.
19. “Giant magneto-piezoresistance and internal friction in a two-dimensional electron system”
H. Yamaguchi, H. Okamoto, Y. Maruta, S. Ishihara, S. Miyashita, and Y. Hirayama
Japanese Journal of Applied Physics, Part 2, Vol. 46, No. 27 (2007) pp.L658-L660.
18. “Controllable coupling between flux qubit and nanomechanical resonator by magnetic field”
F. Xue, Y.D. Wang, C.P. Sun, H. Okamoto, H. Yamaguchi, and K. Semba
New Journal of Physics, Vol. 9, 35 (2007).
17. “Mechanically detected electron energy dissipation in two-dimensional electron systems”
H. Yamaguchi, H. Okamoto, Y. Maruta, S. Ishihara, S. Miyashita, and H. Hirayama
Physics of Semiconductors, Pts A and B, Vol. 893, pp.529-530 (2007).
15. “Electron phase modulation in a suspended InAs/AlGaSb nanomechanical beam”
I. Mahboob, H. Okamoto, M. Ueki, and H. Yamaguchi
Applied Physics Letters, Vol. 89, 192106 (2006).
14. “A piezoresistive cantilever integrating an InAs-based semiconductor-superconductor junction”
H. Okamoto, T. Akazaki, M. Ueki, H. Yamaguchi, and H. Namatsu
Physica E, Vol. 32, pp.512-515 (2006).
13. “Difference in the self-assembling morphology of peptide nanorings”
H. Okamoto, T. Yamada, H. Miyazaki, T. Nakanishi, K. Takeda, K. Usui, I. Obataya, H. Mihara, H. Azehara, W. Mizutani,
K. Hashimoto, H. Yamaguchi, and Y. Hirayama
Japanese Journal of Applied Physics, Part 1, Vol. 44, No. 11, pp.8240-8248 (2005).
11. “Strongly enhanced sensitivity of piezoresistive cantilevers by utilizing the superconducting proximity effect”
H. Okamoto, T. Akazaki, M. Ueki, and H. Yamaguchi
Japanese Journal of Applied Physics, Part 2, Vol. 44, No. 28 (2005) pp.L893-L895.
9. “A study of the self-assembling morphology in peptide nanorings and nanotubes”
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
Materials Research Society Symposium Proceedings EXS-1, pp.245-247 (2004).
7. “Theoretical prediction and atomic force microscope observations of the protein nanotube consisting of
homo-L-amino acid penta-peptide nanorings”
H. Okamoto, T. Nakanishi, Y. Nagai, K.Takeda, I. Obataya, H. Mihara, H. Azehara, and W. Mizutani
Japanese Journal of Applied Physics, Part 1, Vol. 42, No. 2R, pp.676-679 (2003).
5. “Synthesis and atomic force microscopy observations of the single peptide nanotubes and their micro-order assemblies”
T. Nakanishi, H. Okamoto, Y. Nagai, K. Takeda, I. Obataya, H. Mihara, H. Azehara, Y. Suzuki, W. Mizutani, K. Furukawa,
and K. Torimitsu
Physical Review B, Vol. 66, 165417 (2002).
4. “First-principles study of the electronic and molecular structure of protein nanotubes”
H. Okamoto, K. Takeda, and K. Shiraishi
Physical Review B, Vol. 64, 115425 (2001).
3. “Theoretical possibility of semiconductive properties in peptide nanotubes”
H. Okamoto, M. Kasahara, K. Takeda, and K. Shiraishi
Springer Proceedings in Physics, Vol. 87, pp.1637-1638 (2001).
2. “First-principles study on the stable molecular structures of disulfide peptide nanotubes”
M. Kasahara, H. Okamoto, T. Nakanishi, K. Takeda, and K. Shiraishi
Peptide Science 2000, pp.105-108 (2000).
1. “First-principles study on the stable molecular structures of peptide nanotubes”
H. Okamoto, M. Kasahara, K. Takeda, and K. Shiraishi
Peptide Science 1999, pp.67-70 (1999).
Japanese Journal
