Extraction-Controlled Quantum Cascade Lasers

Details Extraction-Controlled Quantum Cascade Lasers Extraction-Controlled Quantum Cascade Lasers

2010-07-30

arxiv.org/abs/1007.5407v1

Applied Physics Lettes 97, 081105 (2010)

Physics

Condensed Matter

Other Condensed Matter

3 pages, 3 figures included in text

Scientific paper

10.1063/1.3483764

A simple two-well design for terahertz quantum cascade lasers is proposed which is based on scattering injection and the efficient extraction of electrons from the lower laser level by resonant tunneling. In contrast to existing designs this extraction also controls the positive differential conductivity. The device is analyzed by calculations based on nonequilibrium Green functions, which predict lasing operation well above 200 K at a frequency of 2.8 THz.

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