1 January 2009 Progress towards intersubband quantum-box lasers for highly efficient continuous wave operation in the mid-infrared
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Abstract
Intersubband Quantum-Box (IQB) lasers; that is, devices consisting of 2-D arrays of ministacks (i.e., 2-4 stages) intersubband QB emitters are proposed, as an alternative to 30-stage quantum-cascade (QC) devices, as sources for efficient room-temperature (RT) emission in the mid-infrared (4-6 μm) wavelength range. Preliminary results include: 1) the design of devices for operation with 50% wallplug efficiency at RT;2) realization of a novel type of QC device: the deep-well (DW)QC laser, that has demonstrated at λ=4.7μm low temperature sensitivity of the threshold current, a clear indication of suppressed carrier leakage; 3) the formation of 2-D arrays at nanopoles by employing nanopatterning and dry etching; 4) the formation of 40nm-diameter, one-stage IQB structures on 100nm centers by preferential regrowth via metal-organic vapor phase epitaxy (MOVPE).
Dan Botez, Gene Tsvid, Mithun D'Souza, Manish K. Rathi, Jae-Cheol Shin, Jeremy Kirch, Luke J. Mawst, Thomas F. Kuech, Igor Vurgaftman, Jerry R. Meyer, Jason J. Plant, George W. Turner, "Progress towards intersubband quantum-box lasers for highly efficient continuous wave operation in the mid-infrared," Journal of Nanophotonics 3(1), 031606 (1 January 2009). https://doi.org/10.1117/1.3085992 . Submission:
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