Special Section on Quantum Dots

Progress towards intersubband quantum-box lasers for highly efficient continuous wave operation in the mid-infrared

[+] Author Affiliations
Dan Botez, Gene Tsvid, Mithun D'Souza, Manish K. Rathi, Jae C. Shin, Jeremy Kirch, Luke J. Mawst, Thomas F. Kuech

Reed Center for Photonics, University of Wisconsin - Madison, 1415 Engineering Drive, Madison, WI 53706-1691

Igor Vurgaftman, Jerry Meyer

Code 5613, Naval Research Laboratory, Washington, DC 20375

Jason Plant, George Turner

MIT Lincoln Lab, MS C215, 244 Wood St., Lexington, MA 02420

J. Nanophoton. 3(1), 031606 (January 30, 2009). doi:10.1117/1.3085992
History: Received August 22, 2008; Revised November 18, 2008; Accepted November 20, 2008; January 30, 2009; Online January 30, 2009
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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).

© 2009 Society of Photo-Optical Instrumentation Engineers

Citation

Dan Botez ; Gene Tsvid ; Mithun D'Souza ; Manish K. Rathi ; Jae C. Shin, et al.
"Progress towards intersubband quantum-box lasers for highly efficient continuous wave operation in the mid-infrared", J. Nanophoton. 3(1), 031606 (January 30, 2009). ; http://dx.doi.org/10.1117/1.3085992


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