Blue-green semiconductor quantum well and micro-resonator lasers
Compact blue and green semiconductor lasers will impact significantly on such technologies as optical storage and multicolor displays. Here I review key features of diode lasers based on II-VI semiconductor heterostructures. The design and performance of a continuous wave laser is discussed in terms of the impact of a quantum well layer (<100 {Angstrom}) on the physics of optical gain and the use of {open_quote}bandstructure engineering{close_quote} concepts to implement a low resistance electrical contacts. Specific forms of crystalline defects are a major source of present device degradation and impediment to longevity; however, significant progress is being made. New departures for the blue-green emitters involve vertical cavity lasers in which photonic nanostructures are designed for enhanced interaction between the electronic states in the quantum wells (excitons) and the electromagnetic field. Recent work has led to the demonstration of exceptionally large coherent coupling effects in such microcavity configurations as well as and providing a demonstration for a vertical cavity laser at room temperature.
- OSTI ID:
- 215107
- Report Number(s):
- CONF-950801--
- Country of Publication:
- United States
- Language:
- English
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