GaN-Based Heterojunction Structures for Simultaneous Detection of Ultraviolet/Infrared Radiation

ORAL

Abstract

Ultraviolet and infrared (UV/IR) dual-band photodetectors have potential applications in various areas, such as fire/flame detection, solar astronomy, military sensing, situational awareness applications, and combustion process monitoring. Since GaN-based UV/IR detectors do not respond to solar or artificial visible lighting, the false detection rate is strongly reduced. Use of a single detector for detecting UV/IR can also eliminate the difficulties of operating several individual detectors with separate electronics and cooling mechanisms. Here, we report a dual-band detector which simultaneously detects UV (250 -- 360 nm) and IR (5 -- 14 $\mu $m) regions, showing near zero spectral crosstalk. This allows the detection of both UV and IR incident radiation, separately identifying the relative strength of each photocurrent component. Further improvements for the detector are also discussed.

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Authors

  • R. Jayasinghe

    Georgia State University

  • G. Ariyawansa

    Georgia State University

  • Nikolaus Dietz

    Georgia State University, Atlanta, Department of Physics \& Astronomy, Georgia State University, Atlanta, GA, 30303, Georgia State University, Department of Physics and Astrronomy, Georgia State University, Atlanta GA. 30303, Physics \& Astronomy Department, Georgia State University, Atlanta, GA 30303, Physics \& Astronomy Department, Georgia State University, Atlanta, GA, 30303

  • A.G.U. Perera

    Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303, USA, Dept of Physics and Astronomy, Georgia State University, Department of Physics and Astronomy, Georgia State University, Atlanta, GA-30303, USA, Georgia State University

  • S. Matsik

    NDP Optronics LLC, Georgia State University

  • Ian Ferguson

    Georgia Institute of Technology, Gerogia Institure of Technology, School of ECE, Georgia Institute of Technology, Atlanta GA

  • S. Laframboise

    National Research Council, Canada

  • A. Bezinger

    National Research Council, Canada, National Research Council Canada

  • M. Buchanan

    Institute for Microstructural Sciences, National Research Council, Canada, National Research Council, Canada

  • H.C. Liu

    Institute for Microstructural Sciences, National Research Council, Canada, National Research Council, Canada, National Research Council Canada