Recent works
>>Japanese
Since 7. 2007
    Recent publications
    • On-chip transfer of ultrashort graphene plasmon wavepackets using terahertz electronics
      K. Yoshioka, G. Bernard, T. Wakamura, M. Hashisaka, K. Sasaki, S. Sasaki, K. Watanabe, T. Taniguchi, and N. Kumada
      arXiv:2311.02821

    • Gate-tunable giant superconducting nonreciprocal transport in few-layer Td-MoTe2
      T. Wakamura, M. Hashisaka, S. Hoshino, M. Bard, S. Okazaki, T. Sasagawa, T. Taniguchi, K. Watanabe, K. Muraki, and N. Kumada
      Phys. Rev. Research 6, 013132 (2024).

    • Emission and coherent control of Levitons in graphene
      A. Assouline, L. Pugliese, H. Chakraborti, S. Lee, L. Bernabeu, M. Jo, K. Watanabe, T. Taniguchi, D. C. Glattli, N. Kumada, H.-S. Sim, F. D. Parmentier, and P. Roulleau
      Science 382, 1260 (2023).

    • Coherent-Incoherent Crossover of Charge and Neutral Mode Transport as Evidence for the Disorder-Dominated Fractional Edge Phase
      M. Hashisaka, T. Ito, T. Akiho, S. Sasaki, N. Kumada, N. Shibata, and K. Muraki
      Phys. Rev. X 13, 031024 (2023).

    • Fast time-domain current measurement for quantum dot charge sensing using a homemade cryogenic transimpedance amplifier
      H. Bohuslavskyi, M. Hashisaka, T. Shimizu, T. Akiho, K. Muraki, and N. Kumada
      Appl. Phys. Lett. 121, 184003 (2022).

    • Time-resolved measurement of ambipolar edge magnetoplasmon transport in InAs/InGaSb composite quantum wells
      H. Kamata, H. Irie, N. Kumada, and K. Muraki
      Phys. Rev. Research 4, 033214 (2022).

    • Scaling behavior of electron decoherence in a graphene Mach-Zehnder interferometer
      M. Jo, J. M. Lee, A. Assouline, P. Brasseur, K. Watanabe, T. Taniguchi, P. Roche, D. C. Glattli, N. Kumada, F. D. Parmentier, H. -S. Sim, and P. Roulleau
      Nature Commun. 13, 5473 (2022).

    • Ultrafast intrinsic optical-to-electrical conversion dynamics in graphene photodetector
      Katsumasa Yoshioka, Taro Wakamura, Masayuki Hashisaka, Kenji Watanabe, Takashi Taniguchi, and Norio Kumada
      Nature Photonics 16, 718 (2022).

    Presentations in international conferences in the last one year and those upcoming
    • Ultrafast Carrier Dynamics in Graphene Investigated by Terahertz Spectroscopy (Invited)
      Norio Kumada
      Germany-Japan Workshop on Recent Developments in Quantum Materials and Nanoscale Devices

    • Ultrafast carrier dynamics in graphene (Invited)
      Norio Kumada
      Moriond Meso

    • Coherent-Incoherent Crossover of Charge and Neutral Mode Transport as Evidence for the Disorder-Dominated Fractional Edge Phase (Invited)
      Masayuki Hashisaka, Takuya Ito, Takafumi Akiho, Satoshi Sasaki, Norio Kumada, Naokazu Shibata, Koji Muraki
      Quantum Phenomena in 2D Matter

    • Ultrafast Dynamics of Optical-to-Electrical Conversion in Black Phosphorus
      Katsumasa Yoshioka, Taro Wakamura, and Norio Kumada
      EP2DS-25/MSS-21

    • Ultrafast On-chip Readout of Propagating THz Graphene Plasmon Wavepackets
      K. Yoshioka, G. Bernard, T. Wakamura, M. Hashisaka, K. Watanabe, T. Taniguchi, and N. Kumada
      EP2DS-25/MSS-21

    • Novel superconducting properties of few-layer Td-MoTe2
      T. Wakamura, M. Hashisaka, M. Bard, S. Okazaki, T. Sasagawa, T. Taniguchi, K. Watanabe, K. Muraki, and N. Kumada
      EP2DS-25/MSS-21

    • Time-resolved helical edge transport in the quantum Hall regime of electron-hole bilayer systems
      H. Kamata, H. Irie, S. Sasaki, N. Kumada, and K. Muraki
      EP2DS-25/MSS-21

    • Bias-induced decoherence in a Mach-Zehnder interferometer consisting of spinresolved copropagating edge channels
      T. Shimizu, M. Hashisaka, E. Iyoda, A. Endo, S. Katsumoto, and N. Kumada
      EP2DS-25/MSS-21

    • Superconductor/semiconductor junction using a cleaved edge surface of an InAs/AlGaSb quantum-well wafer
      T. Akiho, H. Irie, Y. Nakazawa, S. Sasaki, N. Kumada, and K. Muraki
      EP2DS-25/MSS-21

    • Effects of GaAs buffer layer on MBE-grown quantum anomalous Hall insulator V_y(Bi_x Sb_1-x)_2-yTe_3
      Yusuke Nakazawa, Takafumi Akiho, Kiyoshi Kanisawa, Hiroshi Irie, Norio Kumada, and Koji Muraki
      EP2DS-25/MSS-21

    • Excitonic nature of magnons in a quantum Hall ferromagnet (Invited)
      A. Assouline, M. Jo, P. Brasseur, K. Watanabe, T. Taniguchi, Th. Jolicoeur, D. C. Glattli, N. Kumada, P. Roche, F. D. Parmentier, and P. Roulleau
      EP2DS-25/MSS-21

    • Emission and coherent control of Levitons in graphene
      A. Assouline, L. Pugliese, H. Chakraborti1, Seunghun Lee, L. Bernabeu, M. Jo, K. Watanabe,T. Taniguchi, D.C. Glattli, N. Kumada, H.-S. Sim, F.D. Parmentier, and P. Roulleau
      EP2DS-25/MSS-21

    • Tracking Ultrafast Photocurrent Generation and Transport in hBN-Encapsulated Graphene Using On-Chip THz Spectroscopy
      K. Yoshioka, T. Wakamura, M. Hashisaka, K. Watanabe, T. Taniguchi, and N. Kumada
      IRMMW 2022

    • Time-resolved measurement of edge magnetoplasmon transport in electron-hole bilayer systems
      Hiroshi Kamata, H. Irie, S. Sasaki, N. Kumada, and K. Muraki
      LT29

    • Giant Nonreciprocal Charge Transport in Superconducting Few-layer Td-MoTe2
      Taro Wakamura, Masayuki Hashisaka, Shota Okazaki, Takao Sasagawa, Kenji Watanabe, Takashi Taniguchi, Koji Muraki, Norio Kumada
      LT29

    • A hallmark of disordered reconstructededge transport at a fractional-integer quantum Hall junction
      Masayuki Hashisaka, Takuya Ito, Takafumi Akiho, Satoshi Sasaki, Norio Kumada, Naokazu Shibata, Koji Muraki
      LT29

    • Excitonic nature of magnons in a quantum Hall ferromagnet
      Preden Roulleau, Myunglae Jo, Genevieve Fleury, Heung-Sun Sim, Thierry Jolicoeur, Takasi Taniguchi, Patrice Roche, Christian Glattli, Norio Kumada
      LT29