论文信息 - Terahertz-range quantum well photodetector

Terahertz-range quantum well photodetector

We have designed and fabricated GaAs/AlGaAs QWIP photodetector for THz range of spectrum (3THz, 100 μm). To evaluate suitability of this type of detector for real-time THz imaging, a prototype of a small array have been built by integrating detector elements with cryogenic readout electronics. Up to 32 individual channels can be measured with this system at temperatures down to 4K. In this paper we present the design and expected performance of GaAs/AlGaAs THz QWIP integrated with cryogenic readout electronics (CRE), and discuss key development issues related to the design.

[1] S. D. Gunapala,et al. 1024x1024 pixel MWIR and LWIR QWIP focal plane arrays and 320x256 MWIR:LWIR pixel colocated simultaneous dualband QWIP focal plane arrays (Invited Paper) , 2005, SPIE Defense + Commercial Sensing.

[2] E. Linfield,et al. Terahertz semiconductor-heterostructure laser , 2002, Nature.

[3] Marcella Giovannini,et al. InGaAs–AlInAs∕InP terahertz quantum cascade laser , 2005 .

[4] Hiroaki Yasuda,et al. Terahertz electroluminescence from GaSb/AlSb quantum cascade laser , 2005 .

[5] Qing Hu,et al. Operation of terahertz quantum-cascade lasers at 164 K in pulsed mode and at 117 K in continuous-wave mode. , 2005, Optics express.

[6] H. Liu,et al. Terahertz quantum-well photodetector , 2004 .

[7] Hidehiro Kaneda,et al. Development of a gallium-doped germanium far-infrared photoconductor direct hybrid two-dimensional array. , 2003, Applied optics.