Title :
Quantum-dot cascade laser: proposal for an ultralow-threshold semiconductor laser
Author :
Wingreen, Ned S. ; Stafford, Charles A.
Author_Institution :
NEC Res. Inst., Princeton, NJ, USA
fDate :
7/1/1997 12:00:00 AM
Abstract :
We propose a quantum-dot version of the quantum-well cascade laser of Faist et al., see Science, vol. 264, p. 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 (10-20 nm) and on dot density and uniformity [one coupled pair of dots per (200 nm3) with 5% nonuniformity] are close to current technology
Keywords :
laser theory; quantum well lasers; semiconductor device models; coupled pair; dot density; dot size; nonuniformity; quantum-dot cascade laser; quantum-dot version; quantum-well cascade laser; several order-of-magnitude reduction; single phonon decays; three-dimensional confinement; threshold current; ultralow-threshold semiconductor laser; uniformity; Electrons; Laser excitation; Phonons; Proposals; Quantum cascade lasers; Quantum dot lasers; Quantum dots; Quantum well lasers; Semiconductor lasers; Threshold current;
Journal_Title :
Quantum Electronics, IEEE Journal of
