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Title: Double metal waveguide InGaAs/AlInAs quantum cascade lasers emitting at 24 μm

A study on far-infrared In{sub 0.53}Ga{sub 0.47}As/Al{sub 0.48}In{sub 0.52}As quantum cascade lasers operating with a double metal waveguide is presented. To increase the laser upper state lifetime, a diagonal bound-to-continuum transition scheme is used in the active region. The observed threshold current density at 50 K is 5.7 kA/cm{sup 2}, and the maximum operation temperature is 240 K. The laser emission wavelength is 24.4 μm, which is the longest wavelength in the mid-infrared quantum cascade lasers so far reported.
Authors:
; ;  [1]
  1. Institute for Quantum Electronics, ETH Zurich, Auguste-Piccard-Hof 1, 8093 Zurich (Switzerland)
Publication Date:
OSTI Identifier:
22350744
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINIUM COMPOUNDS; ARSENIC COMPOUNDS; CURRENT DENSITY; DENSITY; EMISSION; FAR INFRARED RADIATION; GALLIUM ARSENIDES; GALLIUM COMPOUNDS; INDIUM ARSENIDES; INDIUM COMPOUNDS; LASERS; LIFETIME; METALS; THRESHOLD CURRENT; WAVEGUIDES; WAVELENGTHS