Mr. Victor Kuncser Profile

Victor Kuncser

at Institutul National pentru Fizica Materialelor

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Proceedings Article | 23 February 2000 Paper

Mixed-valence ion-doped PVA as potential materials for real-time holography

M. Bulinski, V. Kuncser, Iancu Iova, A. Bela, Hilmar Franke, U. Russo, G. Filoti

Proceedings Volume 4068, (2000) https://doi.org/10.1117/12.378670

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Mixed valence ion doped polymers are potential materials for the real time holography. We review the intimate mechanisms imposing suitable optical properties in Fe:PVA, stressing on the main role played by the Fe ions. Under the UV exposure, both the refractive index and the absorption coefficient are changing due to a local electron transfer from the PVA matrix to the Fe³⁺ ions. The absorption coefficient proved to be dependent on a new-formed low spin Fe²⁺ state whereas the refractive index and the absorption coefficient are changing due to a local electron transfer from the PVA matrix to the Fe³⁺ ions. The absorption coefficient proved to be dependent on a new-formed low spin Fe²⁺ state whereas the refractive index is related to the total content of the high spin Fe²⁺ state. The diffraction efficiency data are explained in terms of the Fe²⁺/Fe³⁺ ratio. Additional data concerning the electron transfer in Sn:PVA thin films are also discussed.

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