Chief Scientist Laboratories Nanoscale Quantum Photonics Laboratory
Chief Scientist: Yuichiro Kato (Ph.D.)
Research Summary
Quantum technologies are expected to make important developments in various fields of engineering including computing, sensing, metrology, and communication. Since quantum effects become more evident and more robust as the system scales down, devices with atomically precise elements could provide a route for quantum technologies operating at elevated temperatures. Our research focuses on the optical properties of nanomaterials and the physics of nanoscale photonic devices, investigating new approaches for utilizing their quantum properties. By engineering atomically defined nanostructures and integrating them into nanoscale devices, we explore novel concepts in photonics for future quantum technologies.
Main Research Fields
- Interdisciplinary Science & Engineering
Related Research Fields
- Mathematical & Physical Sciences
- Chemistry
- Engineering
- nanostrucutre physics
- optical engineering and photon science
Keywords
- optical properties
- nanoscale physics
- device physics
- carbon nanotubes
- photonic crystals
Selected Publications
Papers with an asterisk(*) are based on research conducted outside of RIKEN.
- 1.
N. Fang, Y. R. Chang, S. Fujii, D. Yamashita, M. Maruyama, Y. Gao, C. F. Fong, D. Kozawa, K. Otsuka, K. Nagashio, S. Okada, Y. K. Kato:
"Room-temperature quantum emission from interface excitons in mixed-dimensional heterostructures"
Nature Commun. 15, 2871 (2024). - 2.
S. Fujii, N. Fang, D. Yamashita, D. Kozawa, C. F. Fong, Y. K. Kato:
"van der Waals decoration of ultra-high-Q silica microcavities for χ(2)-χ(3) hybrid nonlinear photonics"
Nano Lett. 24, 4209 (2024). - 3.
N. Fang, Y. R. Chang, D. Yamashita, S. Fujii, M. Maruyama, Y. Gao, C. F. Fong, K. Otsuka, K. Nagashio, S. Okada, Y. K. Kato:
"Resonant exciton transfer in mixed-dimensional heterostructures for overcoming dimensional restrictions in optical processes"
Nature Commun. 14, 8152 (2023). - 4.
N. Fang, D. Yamashita, S. Fujii, K. Otsuka, T. Taniguchi, K. Watanabe, K. Nagashio, Y. K. Kato:
"Quantization of mode shifts in nanocavities integrated with atomically thin sheets"
Adv. Opt. Mater. 10, 2200538 (2022). - 5.
D. Kozawa, X. Wu, A. Ishii, J. Fortner, K. Otsuka, R. Xiang, T. Inoue, S. Maruyama, Y. Wang, Y. K. Kato:
"Formation of organic color centers in air-suspended carbon nanotubes using vapor-phase reaction"
Nature Commun. 13, 2814 (2022). - 6.
H. Machiya, D. Yamashita, A. Ishii, Y. K. Kato:
"Evidence for near-unity radiative quantum efficiency of bright excitons in carbon nanotubes from the Purcell effect"
Phys. Rev. Research 4, L022011 (2022). - 7.
Z. Li, K. Otsuka, D. Yamashita, D. Kozawa, Y. K. Kato:
"Quantum emission assisted by energy landscape modification in pentacene-decorated carbon nanotubes"
ACS Photonics 8, 2367 (2021). - 8.
K. Otsuka, N. Fang, D. Yamashita, T. Taniguchi, K. Watanabe, Y. K. Kato:
"Deterministic transfer of optical-quality carbon nanotubes for atomically defined technology"
Nature Commun. 12, 3138 (2021). - 9.
A. Ishii, H. Machiya, Y. K. Kato:
"High efficiency dark-to-bright exciton conversion in carbon nanotubes"
Phys. Rev. X 9, 041048 (2019). - 10.
*Y. K. Kato, R. C. Myers, A. C. Gossard, D. D. Awschalom:
"Observation of the spin Hall effect in semiconductors"
Science 306, 1910 (2004).
Recent Research Results
May 25, 2021
Engineering matter at the atomic level
Annual research report
Related Links
Lab Members
Principal investigator
- Yuichiro Kato
- Chief Scientist
Core members
- Wataru Terashima
- Research Scientist
- Nan Fang
- Research Scientist
- Chee Fai Fong
- Special Postdoctoral Researcher
- Ufuk Erkilic
- Postdoctoral Researcher
- Mengyue Wang
- Postdoctoral Researcher
- Yih-Ren Chang
- Visiting Researcher
- Kenichi Cho
- Visiting Researcher
- Keigo Otsuka
- Visiting Scientist
Contact Information
Room 410, Main Research Building,
2-1 Hirosawa,
Wako, Saitama
351-0198, Japan
Tel: +81-(0)48-462-1449
Email: katogp-info [at] ml.riken.jp