The Kato Group

We exploit state-of-the-art nanofabrication technologies to develop and engineer photonic and optoelectronic devices that utilize quantum effects, with focus on devices incorporating individual single-walled carbon nanotubes and atomically-thin layered materials.

Recent Publications

Preprints are available at arxiv.org/a/kato_y_1.
D. Yamashita, N. Fang, S. Fujii, Y. K. Kato Hybrid silicon all-optical switching devices integrated with 2D material Adv. Opt. Mater. 13, 2402531 (2025).
D. Kozawa, S. Fujii, Y. K. Kato Intrinsic process for upconversion photoluminescence via K-momentum-phonon coupling in carbon nanotubes Phys. Rev. B 110, 155418 (2024).
C. F. Fong, D. Yamashita, N. Fang, S. Fujii, Y.-R. Chang, T. Taniguchi, K. Watanabe, Y. K. Kato Self-Aligned Hybrid Nanocavities Using Atomically Thin Materials ACS Photonics 11, 2247 (2024).
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).
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).
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).