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, Dan Botez, Gene Tsvid, Gene Tsvid, Mithun D'Souza, Mithun D'Souza, Manish K. Rathi, Manish K. Rathi, Jae-Cheol Shin, Jae-Cheol Shin, Jeremy Kirch, Jeremy Kirch, Luke J. Mawst, Luke J. Mawst, Thomas F. Kuech, Thomas F. Kuech, Igor Vurgaftman, Igor Vurgaftman, Jerry R. Meyer, Jerry R. Meyer, Jason J. Plant, Jason J. Plant, George W. Turner, 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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