[25a-11F-1~11] 3.11 Nanoscale optical science and near-field optics (formerly 3.12)

11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)

[25a-11F-9] Antenna-enhanced Quantum Ratchet Infrared Detectors

〇Hideki T. Miyazaki¹, Takaaki Mano¹, Takeshi Noda¹, Takeshi Kasaya¹, Yusuf B. Habibullah¹, Nobuyuki Ishida¹ (1.NIMS)

Keywords:

antennas,quantum wells,infrared detectors

Quantum-well infrared photodetectors combined with optical patch antennas are known to exhibit comparable performance with traditional HgCdTe detectors. In this study, we replaced conventional photoconductive quantum wells with a photovoltaic quantum-well structure suitable for high temperature operation and image sensors. Newly designed quantum-well structures named quantum ratchet detectors with high resistance and low noise are embedded in optical antennas and a world-class specific detectivity 6.8×10¹⁰ cmHz^1/2/W at 6.4 μm wavelength has been demonstrated.