The 78th JSAP Autumn Meeting, 2017

Presentation information

Oral presentation

3 Optics and Photonics » 3.11 Photonic structures and phenomena

[6a-A405-1~9] 3.11 Photonic structures and phenomena

3.11と13.7,3.11と3.12のコードシェアセッションあり

Wed. Sep 6, 2017 9:15 AM - 11:45 AM A405 (405+406)

Akihiko Shinya(NTT)

11:30 AM - 11:45 AM

[6a-A405-9] Electrical control of inter-subband absorption in GaN/AlGaN MQWs for modulation of MWIR thermal emission

Dongyeon Daniel Kang1, Takuya Inoue1,2, Takashi Asano1, Susumu Noda1 (1.Kyoto Univ., 2.K-CONNEX)

Keywords:Thermal emission, GaN/AlGaN Quantum wells, Photonic crystals

Narrow band thermal emitters based on photonic crystals are increasing attentions due to the possibility to reduce the size and power consumption in applications including infrared spectroscopy. We have proposed a method to dramatically control the emissivity (absorptivity) of the thermal emitter, which utilizes both the intersubband absorption of GaAs / AlGaAs quantum well (MQW) and photonic crystals. And, we have demonstrated that the narrow band (Q> 100) thermal emitter with the high-speed modulation (~ MHz) of thermal emission by utilizing the electrical control of intersubband absorption of MQW. Now, we aim to realize the dynamic control of GaN / AlGaN narrow-band thermal emitters, which operates in the mid-wavelength infrared region (3 to 8 μm). For this purpose, we experimentally demonstrate electrical switching of intersubband absorption of GaN / AlGaN MQW.