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Outline

Advances in device fabrication techniques have enabled integration of individual nanomaterials, where single electrons and single photons could be addressed. We exploit state-of-the-art nanofabrication technologies to develop and engineer optoelectronic devices with novel functionalities that can only be achieved by utilizing the quantum nature of electrons and photons at the nanoscale. We investigate devices that would allow for control over the interactions between electrons and photons at the quantum mechanical level, which would lead to quantum photon sources and optical-to-electrical quantum interfaces.

Fields

Interdisciplinary Science and Engineering, Engineering, Mathematical and physical sciences, Chemistry

Keywords

optoelectronics, quantum devices, nanoscale devices, carbon nanotubes, photonic crystals

Subjects

1. Room-temperature telecommunication-wavelength single photon source
2. Electroluminescence devices with extremely low energy dissipation
3. Optical sensors with novel functionalities

Selected Publications

1. Li, Z., Otsuka, K., Yamashita, D., Kozawa, D., and Kato, Y. K.: “Quantum emission assisted by energy landscape modification in pentacene-decorated carbon nanotubes” , ACS Photonics 8, 2367 (2021).
2. 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” , Nature Commun. 12, 3138 (2021).
3. Ishii, A., Machiya, H., and Kato, Y. K.: “High efficiency dark-to-bright exciton conversion in carbon nanotubes” , Phys. Rev. X 9, 041048 (2019).
4. Ishii, A., Uda, T., and Kato, Y. K.: “Room-temperature single-photon emission from micrometer-long air-suspended carbon nanotubes” , Phys. Rev. Applied 8, 054039 (2017).
5. Jiang, M., Kumamoto, Y., Ishii, A., Yoshida, M., Shimada, T., and Kato, Y. K.: “Gate-controlled generation of optical pulse trains using individual carbon nanotubes” , Nature Commun. 6, 6335 (2015).

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