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Title: High temperature, single mode, long infrared (λ = 17.8 μm) InAs-based quantum cascade lasers

We demonstrate quantum cascade lasers in the InAs/AlSb material system which operate up to 333 K (in pulsed regime) at λ = 17.8 μm. They employ metal-metal optical waveguides and the threshold current density is 1.6 kA/cm{sup 2} at 78 K. We also report distributed-feedback devices obtained using the same laser material via a 1{sup st}-order Bragg grating inscribed in the sole top metallic contact. Spectral single mode operation with more than 20 dB side mode suppression ratio is achieved at a temperature of 300 K. Large wavelength tuning rates, of the order of 1.5 nm/K, are demonstrated. A wavelength coverage of 0.38 μm is achieved in single-mode regime over a temperature range of 255 K.
Authors:
; ; ;  [1] ; ; ; ;  [2]
  1. Institut d'Electronique Fondamentale, Univ. Paris Sud, UMR 8622 CNRS, 91405 Orsay (France)
  2. Institut d'Electronique du Sud, Univ. Montpellier 2, UMR 5214 CNRS, 34095 Montpellier (France)
Publication Date:
OSTI Identifier:
22303495
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 11; 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; ANTIMONIDES; DENSITY; EQUIPMENT; FEEDBACK; INDIUM ARSENIDES; LASER MATERIALS; LASERS; METALS; THRESHOLD CURRENT; WAVEGUIDES; WAVELENGTHS