Skip to Main content Skip to Navigation
Journal articles

Temperature enhancement of the photorefractive effect in GaAs due to the metastable state of the EL2 defect

Abstract : We present a theoretical and experimental analysis of photorefractive two-beam coupling in undoped GaAs as a function of temperature. The theoretical treatment includes the metastable state of the EL2 defect with its optical properties (optical generation and optical recovery) in the photorefractive model. Three major features are predicted by this model: First, a change of the sign of the photorefractive beam coupling gain around 150 K; second, an enhancement of the space-charge field by a factor of 2 compared to the diffusion field; and, finally, the appearance of a strong peak due to an absorption grating around 150 K. All these features are actually observed experimentally with a good correlation between experimental data and theoretical simulation.
Document type :
Journal articles
Complete list of metadatas

https://hal-iogs.archives-ouvertes.fr/hal-00673556
Contributor : Marie-Laure Edwards <>
Submitted on : Friday, February 24, 2012 - 11:22:09 AM
Last modification on : Wednesday, September 16, 2020 - 5:42:36 PM
Long-term archiving on: : Friday, May 25, 2012 - 2:20:24 AM

File

PhD1-17.pdf
Publisher files allowed on an open archive

Identifiers

Collections

Citation

Philippe Delaye, B. Sugg. Temperature enhancement of the photorefractive effect in GaAs due to the metastable state of the EL2 defect. Physical Review B: Condensed Matter and Materials Physics, American Physical Society, 1994, 50 (23), pp.16973-16984. ⟨10.1103/PhysRevB.50.16973⟩. ⟨hal-00673556⟩

Share

Metrics

Record views

207

Files downloads

135