Gain spectra of quantum wires with inhomogeneous broadening
- 1 April 1989
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Quantum Electronics
- Vol. 25 (4), 705-712
- https://doi.org/10.1109/3.17334
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-AA-radius and 150-AA-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.<>Keywords
This publication has 14 references indexed in Scilit:
- Spectral and dynamic characteristics of buried-heterostructure single quantum well (Al,Ga)As lasersApplied Physics Letters, 1988
- Quantum box fabrication tolerance and size limits in semiconductors and their effect on optical gainIEEE Journal of Quantum Electronics, 1988
- Ultrahigh relaxation oscillation frequency (up to 30 GHz) of highly p-doped GaAs/GaAlAs multiple quantum well lasersApplied Physics Letters, 1987
- Low-temperature photoluminescence from InGaAs/InP quantum wires and boxesApplied Physics Letters, 1987
- Reduction of the field spectrum linewidth of a multiple quantum well laser in a high magnetic field—spectral properties of quantum dot lasersApplied Physics Letters, 1987
- Second quantized state lasing of a current pumped single quantum well laserApplied Physics Letters, 1986
- Optical spectroscopy of ultrasmall structures etched from quantum wellsApplied Physics Letters, 1986
- Gain and the threshold of three-dimensional quantum-box lasersIEEE Journal of Quantum Electronics, 1986
- 11-GHz direct modulation bandwidth GaAlAs window laser on semi-insulating substrate operating at room temperatureApplied Physics Letters, 1984
- Multidimensional quantum well laser and temperature dependence of its threshold currentApplied Physics Letters, 1982