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Journal articles
Influence of shallow traps on the enhancement of the photorefractive grating amplitude by a high-frequency alternating electric field: a probabilistic analysis
Abstract : We calculate the photorefractive grating amplitude in the presence of a high-frequency applied electric field in terms of the mean-square drift length of the charge carriers. We describe how a shallow-trap level and the related long effective deep-trap recombination time are detrimental to the enhancement produced by a squarewave field. We give expressions for the shallow-trap-induced reduction in the steady-state photorefractive gain as well as for its frequency dependence. The photorefractive gain reaches the same value obtained in the one-level model at low frequencies but falls almost exponentially to a shallow trap-limited value for higher frequencies. We compare the predictions of our model with other existing models and with experimental data.
Cited literature [12 references]
https://hal-iogs.archives-ouvertes.fr/hal-00861450
Contributor : Fatima Pereira <>
Submitted on : Thursday, September 12, 2013 - 4:58:51 PM
Last modification on : Wednesday, September 16, 2020 - 5:43:08 PM
Long-term archiving on: : Friday, December 13, 2013 - 4:24:04 AM
Contributor : Fatima Pereira <>
Submitted on : Thursday, September 12, 2013 - 4:58:51 PM
Last modification on : Wednesday, September 16, 2020 - 5:43:08 PM
Long-term archiving on: : Friday, December 13, 2013 - 4:24:04 AM
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