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Dual-band pixelless upconversion imaging devices

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Abstract

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 GaNAlGaN MIR and FIR dual-band detector integrated with a GaNAlGaN violet light emitting diode. On the basis of the photoresponse of single-period GaNAlGaN 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 GaNAlGaN dual-band pixelless upconverters, which exhibit good image resolution, high quantum efficiency, and negligible cross talk.

© 2007 Optical Society of America

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