Quantum-dot cascade laser: proposal for an ultralow-threshold semiconductor laser
- 1 July 1997
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Quantum Electronics
- Vol. 33 (7) , 1170-1173
- https://doi.org/10.1109/3.594880
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.Comment: 8 pages, REVTEX 3.0, 3 compressed postscript figureKeywords
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