[6a-C14-1~14] 3.13 Semiconductor optical devices

[6a-C14-5] Multicolor Detection with Quantum Well-based Charge Sensitive Infrared Phototransistor (CSIP)

〇Sunmi Kim¹, Susumu Komiyama^2,3, Mikhail Patrashin³, Iwao Hosako³, Yusuke Kajihara¹ (1.IIS, Univ. of Tokyo, 2.Dept. Basic Sci., Univ. of Tokyo, 3.NICT)

Keywords:Quantum well, Multicolor detection, Plasmonic antenna

For the controllable detection at several wavelengths with charge-sensitive infrared phototransistors (CSIPs), multicolor CSIP is demonstrated by introducing multiple photo-floating gates. An unprecedentedly broad detection band, covering wavelength range of 8~17 μm, has been achieved with a quadruple QW structure. Detailed mechanism of the multicolor detection and tuning of the spectral band in terms of gate biasing and plasmonic antenna will be discussed.