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Quantum-dot cascade laser: proposal for an ultralow-threshold semiconductor laser

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2 Author(s)
Wingreen, N.S. ; NEC Res. Inst., Princeton, NJ, USA ; Stafford, C.A.

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

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Quantum Electronics, IEEE Journal of  (Volume:33 ,  Issue: 7 )