AlGaInP multiple quantum wire heterostructure lasers prepared by the strain-induced lateral-layer ordering process
| Autor: | A. C. Chen, P. J. Pearah, K. C. Hsieh, K. Y. Cheng, A. M. Moy |
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| Rok vydání: | 1994 |
| Předmět: |
Photoluminescence
Materials science business.industry Quantum wire Heterojunction Condensed Matter Physics Molecular physics Atomic and Molecular Physics and Optics Semiconductor laser theory law.invention law Optoelectronics Quantum well laser Electrical and Electronic Engineering business Lasing threshold Quantum well Molecular beam epitaxy |
| Zdroj: | IEEE Journal of Quantum Electronics. 30:608-618 |
| ISSN: | 0018-9197 |
| DOI: | 10.1109/3.283809 |
| Popis: | We have established an in situ technique, the strain-induced lateral-layer ordering (SILO) process, whereby lateral composition modulation perpendicular to the growth direction occurs spontaneously during growth by gas source molecular beam epitaxy, producing lateral quantum wells. We have combined this new growth technique with standard quantum well laser growth technology to produce GaInP/AlGaInP strained multiple quantum wire (MQWR) heterostructure lasers. Transmission electron microscopy confirms the presence of laterally ordered MQWR arrays with a linear density of 10/sup 6/ cm/sup -1/. Emission spectra from these MBWR heterostructures exhibit quantized energies and significant polarization anisotropies. Photoluminescence emission energies are analyzed using an approximate strained quantum wire calculation. Electroluminescence spectra are studied both above and below the lasing threshold. Threshold current densities as low as 250 A/cm/sup 2/ are obtained under pulsed conditions at 77 K. The energies, polarizations, and threshold current densities vary according to the orientation of the contact stripe with respect to the MBWR array. These effects are explained in terms of the quantum wire potential, the strain fields present in the MQWR active region, and their effects on the band structure and the optical gain. > |
| Databáze: | OpenAIRE |
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