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Quantum-Dot Cascade Laser: Proposal for an Ultra-Low-Threshold Semiconductor Laser

Ned S. Wingreen·Charles A. Stafford
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Abstract

We propose a quantum-dot version of the quantum-well cascade laser of Faist et al. [Science {\bf 264}, 553 (1994)]. The elimination of single phonon decays by the three-dimensional confinement implies a several order-of-magnitude reduction in the threshold current. The requirements on dot size (10-20nm) and on dot density and uniformity [one coupled pair of dots per (180nm)^3 with 5% nonuniformity] are close to current technology.

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Ned S. Wingreen, Charles A. Stafford. 1996-05-02. Quantum-Dot Cascade Laser: Proposal for an Ultra-Low-Threshold Semiconductor Laser. https://doi.org/10.1109/3.594880

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