Coherent transport in QCLs: a new theoretical approach

Ariel Gordon; Daniel Majer

doi:10.1117/12.841264

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12 February 2010 Coherent transport in QCLs: a new theoretical approach

Ariel Gordon, Daniel Majer

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Proceedings Volume 7616, Novel In-Plane Semiconductor Lasers IX; 761614 (2010) https://doi.org/10.1117/12.841264
Event: SPIE OPTO, 2010, San Francisco, California, United States

Abstract

A new theoretical method for describing QCLs is presented. The method extends the familiar incoherent rate equations to include coherence. Smooth output power and voltage curves as function of current are obtained at very modest computational effort. Coherence is shown to play an important role in QCLs. The method is derived by imposing the following requirements on the equations of motion of the density matrix: 1. Expectation values should be independent of the choice of basis; 2. The density matrix should be positive definite; 3. The model should reduce to existing rate-equation models when coherences are omitted.

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Ariel Gordon and Daniel Majer "Coherent transport in QCLs: a new theoretical approach", Proc. SPIE 7616, Novel In-Plane Semiconductor Lasers IX, 761614 (12 February 2010); https://doi.org/10.1117/12.841264

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