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Title: Nanowire terahertz quantum cascade lasers

Quantum cascade lasers made of nanowire axial heterostructures are proposed. The dissipative quantum dynamics of their carriers is theoretically investigated using non-equilibrium Green functions. Their transport and gain properties are calculated for varying nanowire thickness, from the classical-wire regime to the quantum-wire regime. Our calculation shows that the lateral quantum confinement provided by the nanowires allows an increase of the maximum operation temperature and a strong reduction of the current density threshold compared to conventional terahertz quantum cascade lasers.
Authors:
 [1]
  1. Walter Schottky Institut, Technische Universit√§t M√ľnchen, Am Coulombwall 4, D-85748, Garching (Germany)
Publication Date:
OSTI Identifier:
22350841
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 14; 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; CARRIERS; CONFINEMENT; CURRENT DENSITY; EQUILIBRIUM; GAIN; GREEN FUNCTION; LASER MATERIALS; LASERS; NANOWIRES; OPERATION; QUANTUM WIRES; SIMULATION; THICKNESS