| Autor: |
Pierre Alexandre Blanche, Nasser Peyghambarian, Jayan Thomas, Sergey Basun, Partha P. Banerjee, Dean R. Evans, S. H. Buller, Cory W. Christenson, C. M. Liebig |
| Rok vydání: |
2013 |
| Předmět: |
|
| Zdroj: |
SPIE Proceedings. |
| ISSN: |
0277-786X |
| DOI: |
10.1117/12.2023404 |
| Popis: |
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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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