Dual-band pixelless upconversion imaging devices.
We have proposed a type of mid-infrared (MIR) and far-infrared (FIR) dual-band imaging device, which employs the photon frequency upconversion concept in a GaN/AlGaN MIR and FIR dual-band detector integrated with a GaN/AlGaN violet light emitting diode. On the basis of the photoresponse of single-period GaN/AlGaN dual-band detectors, we present the detailed optimization of multiperiod GaN emitter/AlGaN barrier detectors and their applications to dual-band pixelless upconversion imaging. Satisfying images have been received through the analysis of the modulation transfer function and the upconversion efficiency in the GaN/AlGaN dual-band pixelless upconverters, which exhibit good image resolution, high quantum efficiency, and negligible cross talk.
Wu
Le Ke
le K
Department of Physics, Laboratory of Condensed Matter Spectroscopy and Opto-Electronic Physics, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai 200030, China.
Hao
Hui Lian
HL
Shen
Wen Zhong
WZ
Ariyawansa
Gamini
G
Perera
A G Unil
AG
Matsik
Steven G
SG