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Investigation Of The Microscopic Parameters Governing The Photorefractive Effect In KTa_(1-x)Nb_xO_3: Cu,V

Leyva, Victor and Agranat, Aharon and Yariv, Amnon (1990) Investigation Of The Microscopic Parameters Governing The Photorefractive Effect In KTa_(1-x)Nb_xO_3: Cu,V. In: Digest on Nonlinear Optics: Materials, Phenomena and Devices. IEEE , Piscataway, NJ, pp. 259-260. https://resolver.caltech.edu/CaltechAUTHORS:20170629-132432899

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Abstract

We perform a microscopic analysis of the photorefractive effect in KTa_(1-x)Nb_xO_3: Cu,V. We have independently measured all relevant parameters which enter into the Kukhtarev model of the photorefractive effect. Cu is found to be the partially filled donor level responsible for the photorefractive effect. The total Cu concentration was determined from electron microprobe analysis to be 1.8(1 0^19)cm%3. A series of oxidation and reduction treatments were used to alter the concentration of Cu^(1+) and Cu^(2+). The concentration of Cu in each valence state after each heat treatment was determined using the relative magnitudes of the Cu^(1+) charge transfer band and the Cu^(2+) crystal field transition. The electron photoexcitation cross section at 514nm was determined to be 9.08(10^-20)cm^2 . The ratio of the mobility to electron recombination rate was determined from photoconductivity measurements to be 6.20(10^8) 1 /(v-cm).


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1109/NLO.1990.695943DOIArticle
http://ieeexplore.ieee.org/document/695943/PublisherArticle
Additional Information:© 1990.
DOI:10.1109/NLO.1990.695943
Record Number:CaltechAUTHORS:20170629-132432899
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170629-132432899
Official Citation:V. Leyva, A. Agranat and A. Yariv, "Investigation Of The Microscopic Parameters Governing The Photorefractive Effect In KTa/sub 1-x/Nb/sub x/O/sub 3/: Cu, V," Digest on Nonlinear Optics: Materials, Phenomena and Devices, Kauai, HI, USA, 1990, pp. 259-260. doi: 10.1109/NLO.1990.695943
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:78705
Collection:CaltechAUTHORS
Deposited By:INVALID USER
Deposited On:30 Jun 2017 17:20
Last Modified:15 Nov 2021 17:42

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