High−sensitivity optical recording in KTN by two−photon absorption
- 1 January 1975
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 26 (1), 22-24
- https://doi.org/10.1063/1.87974
Abstract
Birefringence changes are induced in a cubic potassium tantalate niobate crystal with an external electric field by two−photon absorption of picosecond optical pulses. The recording sensitivity of 100 μJ/cm2 for elementary holograms with a few percent reconstruction efficiency is comparable to the sensitivity of holographic silver halide emulsions. The high sensitivity of KTN is shown to be due to efficient charge transport of photoexcited carriers.Keywords
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