Outline

Optoelectronic devices harness the interactions between electrons and photons and are widely used in everyday applications, for example solar cells and light-emitting diodes. Continued advances in device fabrication techniques have enabled the integration of individual nanomaterials into device structures, providing opportunities to utilize the quantum nature of photons. Our research focuses on pioneering and engineering next-generation nanodevices that exploit the quantum properties of nanomaterials and enable control of light at the quantum level. By combining state-of-the-art nanofabrication and nanosynthesis techniques, we investigate devices capable of manipulating single photons in the telecommunication band as well as integrated photonics for quantum applications at room temperature.

Fields

Interdisciplinary Science and Engineering,Engineering, Physics, Chemistry

Keywords

carbon nanotubes, two-dimensional materials, photonic crystals, nanoscale devices, integrated photonics

Subjects

  • Room-temperature telecommunication-wavelength single photon source
  • Electroluminescence devices with extremely low energy dissipation
  • Optical sensors with novel functionalities
Reseach image

carbon nanotube and two-dimensional material on photonic crystal nanobeam cavity

Selected Publications

  • Fang, N., Chang, Y. R., Fujii, S., Yamashita, D., Maruyama, M., Gao, Y., Fong, C. F., Kozawa D., Otsuka, K., Nagashio, K., Okada, S., Kato, Y. K.: “Room-temperature quantum emission from interface excitons in mixed-dimensional heterostructures,” Nat Commun. 15, 2871 (2024).
  • Fang, N., Chang, Y. R., Yamashita, D., Fujii, S., Maruyama, M., Gao, Y., Fong, C. F., Otsuka, K., Nagashio, K., Okada, S., Kato, Y. K.: “Resonant exciton transfer in mixed-dimensional heterostructures for overcoming dimensional restrictions in optical processes,” Nat Commun. 14, 8152 (2023).
  • Kozawa, D., Wu, X., Ishii, A., Fortner, J., Otsuka, K., Xiang, R., Inoue, T., Maruyama, S., Wang, Y-H., Kato, Y. K.: “Formation of organic color centers in air-suspended carbon nanotubes using vapor-phase reaction,” Nat Commun. 13, 2814 (2022).
  • Otsuka, K., Fang, N., Yamashita, D., Taniguchi, T., Watanabe, K., and Kato, Y. K.: “Deterministic transfer of optical-quality carbon nanotubes for atomically defined technology” , Nat Commun. 12, 3138 (2021).
  • Ishii, A., Machiya, H., Kato, Y. K.: “High efficiency dark-to-bright exciton conversion in carbon nanotubes”, Phys. Rev. X 9, 041048 (2019).

Achievements

Members

Members List
Name Position
Yuichiro Kato Team Director
Nan Fang Research Scientist
Mengyue Wang Postdoctoral Researcher
Ufuk Erkilic Postdoctoral Researcher
Kenichi Cho Postdoctoral Researcher
Hiroyuki Nishidome Special Postdoctoral Researcher
Clement Deleau Visiting Researcher
Shun Fujii Visiting Scientist
Daichi Kozawa Visiting Scientist
Daiki Yamashita Visiting Scientist

Access & Contact

2-1 Hirosawa, Wako, Saitama 351-0198 JapanAccess

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