High Power Extremely Shallow Quantum Well Modulators,
Abstract
Light modulators based on electroabsorption in quantum wells (QW's) have been extensively studied in recent years. Their operation relies on the fact that at room temperature a strong exciton can exist due to confinement in the quantum wells, which results in a strong absorption features which can be manipulated with an applied electric field. Applications include optical interconnection of integrated circuits, lightwave applications, and optical computing. For the latter there exists self electro-optic effect devices (SEED'S) which comprise of a QW p-i-n modulator in series with a battery and a load which may be another QW modulator. This circuit is bistable because of the negative resistance of the reverse biased QW modulator when illuminates at the QW exciton peak. This results from the fact that the exciton red-shifts with increasing electric field, causing the absorption, and hence the photocurrent, to decrease with increasing reverse bias.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 22, 1992
- Accession Number
- ADP007826
Entities
People
- J. E. Cunningham
- K. W. Goossen
- L. M. F. Chirovsky
- R. A. Morgan
- W. Y. Jan