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Photorefractive InGaAs/GaAs multiple quantum wells in the Franz-Keldysh geometry.
- Source :
-
Journal of Applied Physics . 6/1/2001, Vol. 89 Issue 11, p5889. 8p. 2 Diagrams, 1 Chart, 9 Graphs. - Publication Year :
- 2001
-
Abstract
- We fabricate semi-insulating InGaAs/GaAs multiple quantum wells and observe the excitonic enhancement of the photorefractivity in the Franz-Keldysh geometry at wavelengths of 0.92-0.94 μm. A maximum two-wave mixing gain of 138 cm[sup -1] and a maximum diffraction efficiency of 1.5x10[sup -4] are obtained. The saturation intensity and the spatial resolution are also measured by four-wave mixing. The diffraction efficiency is saturated at a high external electric field. The dominant cause of this saturation is the deviation of the excitonic electroabsorption from its quadratic law. © 2001 American Institute of Physics. We fabricate semi-insulating InGaAs/GaAs multiple quantum wells and observe the excitonic enhancement of the photorefractivity in the Franz-Keldysh geometry at wavelengths of 0.92-0.94 μm. A maximum two-wave mixing gain of 138 cm[sup -1] and a maximum diffraction efficiency of 1.5x10[sup -4] are obtained. The saturation intensity and the spatial ! resolution are also measured by four-wave mixing. The diffraction efficiency is saturated at a high external electric field. The dominant cause of this saturation is the deviation of the excitonic electroabsorption from its quadratic law. © 2001 American Institute of Physics. We fabricate semi-insulating InGaAs/GaAs multiple quantum wells and observe the excitonic enhancement of the photorefractivity in the Franz-Keldysh geometry at wavelengths of 0.92-0.94 μm. A maximum two-wave mixing gain of 138 cm[sup -1] and a maximum diffraction efficiency of 1.5x10[sup -4] are obtained. The saturation intensity and the spatial resolution are also measured by four-wave mixing. The diffraction efficiency is saturated at a high external electric field. The dominant cause of this saturation is the deviation of the excitonic electroabsorption from its quadratic law. © 2001 American Institute of Physics. [ABSTRACT FROM AUTHOR]
- Subjects :
- *QUANTUM wells
*ELECTROOPTICS
Subjects
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 89
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 4712525
- Full Text :
- https://doi.org/10.1063/1.1370364