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1 February 2008 Broadband photoresponse from InAs quantum dots embedded in a graded well for visible to mid-infrared detection
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Abstract
Interband and intersubband transitions in self-assembled InAs quantum dots embedded in an InGaAs graded well have been investigated for their use in visible to mid-infrared (0.4 - 20 μm) detection applications. The materials were grown by molecular beam epitaxy and characterized using atomic force microscopy and photoluminescence. Devices were fabricated from the multiple quantum dot structures in order to measure the normal incident photoresponse at 77 and 300 K. In addition, the dark current was measured in the temperature range of 77 - 300 K for the devices. A dual broadband photoresponse from the interband and intersubband transitions was measured to be 0.5 to 1.0 μm and 2.0 to 14.0 μm, respectively.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Brandon S. Passmore, Jiang Wu, Eric A. DeCuir Jr., Omar Manasreh, P. M. Lytvyn, Euclydes Marega Jr., Vasyl P. Kunets, and Gregory J. Salamo "Broadband photoresponse from InAs quantum dots embedded in a graded well for visible to mid-infrared detection", Proc. SPIE 6900, Quantum Sensing and Nanophotonic Devices V, 69000O (1 February 2008); https://doi.org/10.1117/12.762338
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