Enhanced gain dynamics in photorefractive polymers

C. M. Liebig; S. Basun; S. S. Buller; D. R. Evans; P. P. Banerjee; P. A. Blanche; C. W. Christenson; N. Peyghambarian; J. Thomas

doi:10.1117/12.2023404

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25 September 2013 Enhanced gain dynamics in photorefractive polymers

C. M. Liebig, S. Basun, S. S. Buller, D. R. Evans, P. P. Banerjee, P. A. Blanche, C. W. Christenson, N. Peyghambarian, J. Thomas

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Proceedings Volume 8847, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications VII; 88470A (2013) https://doi.org/10.1117/12.2023404
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

The complexity of photorefractive polymers arises from multiple contributions to the photo-induced index grating. Analysis of the time dynamics of the two-beam coupling signal is used to extract information about the charge species responsible for the grating formation. It has been shown in a commonly used photorefractive polymer at moderate applied electric fields, the primary charge carriers (holes) establish an initial grating which, however, are followed by a subsequent competing grating (electrons) that decreases the two-beam coupling efficiency. We show by upon using higher applied bias fields, gain enhancement can be achieved by eliminating the electron grating contribution and returning to hole gratings only.

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C. M. Liebig, S. Basun, S. S. Buller, D. R. Evans, P. P. Banerjee, P. A. Blanche, C. W. Christenson, N. Peyghambarian, and J. Thomas "Enhanced gain dynamics in photorefractive polymers", Proc. SPIE 8847, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications VII, 88470A (25 September 2013); https://doi.org/10.1117/12.2023404

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