Nanowire terahertz quantum cascade lasers

Journal Article · Mon Oct 06 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4897543· OSTI ID:22350841

Grange, Thomas ^[1]

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1. Walter Schottky Institut, Technische Universität München, Am Coulombwall 4, D-85748, Garching (Germany)

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.

• OSTI ID: 22350841
• Journal Information: Applied Physics Letters, Vol. 105, Issue 14; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CARRIERS
CONFINEMENT
CURRENT DENSITY
EQUILIBRIUM
GAIN
GREEN FUNCTION
LASER MATERIALS
LASERS
NANOWIRES
OPERATION
QUANTUM WIRES
SIMULATION
THICKNESS