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Gain spectra of quantum wires with inhomogeneous broadening

Zarem, Hal and Vahala, Kerry and Yariv, Amnon (1989) Gain spectra of quantum wires with inhomogeneous broadening. IEEE Journal of Quantum Electronics, 25 (4). pp. 705-712. ISSN 0018-9197. http://resolver.caltech.edu/CaltechAUTHORS:ZARieeejqe89

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Abstract

The effects of fabricational variations on the gain spectra of quantum wires are calculated within the limits of first-order perturbation theory. Gain spectra and density of states for 50-Å-radius and 150-Å-radius cylindrical quantum wires are calculated and plotted for several different fabrication tolerances. The wave functions for a finite, cylindrical potential are calculated and a quasicritical radius, below which the carriers are weakly confined by the potential, is established. This sets a lower limit on quantum wire size. Upper limits on the size of quantum wells, quantum wires, and quantum boxes are also discussed. The threshold current and differential gain of quantum-wire lasers and quantum wire array lasers are calculated. These calculations indicate a possible reduction in threshold current of one to two orders of magnitude as compared to the best quantum-well lasers.


Item Type:Article
Additional Information:© Copyright 1989 IEEE. Reprinted with permission. Manuscript received July 6, 1988; revised October 3, 1988. Two of us (H.Z. and A.Y.) would like to acknowledge the support of ONR and DARPA. One of us (K.V.) would like to acknowledge the support of ONR.
Subject Keywords:electronic density of states; laser theory; perturbation theory; semiconductor junction lasers; semiconductor quantum wells
Record Number:CaltechAUTHORS:ZARieeejqe89
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:ZARieeejqe89
Alternative URL:http://dx.doi.org/10.1109/3.17334
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:6265
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:30 Nov 2006
Last Modified:26 Dec 2012 09:19

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