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

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

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

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).

Original languageEnglish
Article number031606
JournalJournal of Nanophotonics
Volume3
Issue number1
DOIs
StatePublished - 2009

Keywords

  • Intersubband-transition semiconductor laser
  • phonon bottleneck
  • quantum boxes

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