[A-6] III-V Light Sources

[A-6-06] Optical-to-MMW/THz Carrier Frequency Down-Conversion by UTC-PD-Integrated HEMT: the Scaling Rule of Conversion Gain on UTC-PD Mesa Size

〇Dai Nakajima¹, Kazuki Nishimura¹, Tomotaka Hosotani¹, Keisuke Kasai¹, Masato Yoshida¹, Tetsuya Suemitsu², Taichi Otsuji¹, Akira Satou¹ (1. Research Institute of Electrical Communication, Tohoku University (Japan), 2. New Industry Creation Hatchery Center, Tohoku University (Japan))

Presentation style: On-site (in-person)

https://doi.org/10.7567/SSDM.2022.A-6-06

We experimentally investigate the scaling rule of the conversion gain on unitraveling-carrier-photodiode (UTC-PD) mesa size of the UTC-PD-integrated HEMT for optical to millimeter-wave (MMW)/terahertz (THz) frequency down-conversion. We showed that the conversion gain monotonically increases as the mesa size is reduced, due to the suppression of the in-plane diffusion of photogenerated electrons in the absorption layer.