[10p-S5-1~14] 3.12 Semiconductor optical devices

1:30 PM - 1:45 PM JST(4:30 AM - 4:45 AM UTC)

[10p-S5-1] [The 60th Young Scientist Presentation Award Speech] Evaluation of Noise Robustness via Wavelength, Angular, and Polarization Selectivity
in Photonic Crystal Quantum Cascade Detectors

〇Tomoki Tsukada¹, Rei Hashimoto¹, Tsutomu Kakuno¹, Masatoshi Hirono¹, Kei Kaneko¹, Lisa Suzuki¹, Tetsuya Miyagawa¹, Afshan Begum², Naoki Ikeda², Takaaki Mano², Keisuke Watanabe², Takashi Kuroda², Kazuaki Sakoda², Sinji Saito³ (1.Toshiba Corp., 2.NIMS, 3.Shoukou Univ.)

Keywords:

Quantum Cascade Detector,Photonic Crystal,mid-infrared light

Background thermal radiation from room-temperature objects acts as noise in mid-infrared gas spectroscopy, limiting high-sensitivity detection. In this study, a quantum cascade detector with a photonic crystal structure (PC-QCD) was developed, enabling wavelength, angular, and polarization selectivity without external optical filters. The device exhibited a wavelength selectivity with a full width at half maximum of 7.3 nm, an angular selectivity of 1.0 × 13.8°, and a polarization selectivity with an extinction ratio of 14. Compared with a conventional InAsSb detector, multidimensional selectivity–induced noise reduction was demonstrated for the first time.