Temperature dependent measurements on a low-molecular-weight photorefractive glass

Ralf Bausinger; Andre Leopold; Stephan J. Zilker; Dietrich Haarer; Jolita Ostrauskaite; Mukundan Thelakkat

doi:10.1117/12.452737

16 January 2002 Temperature dependent measurements on a low-molecular-weight photorefractive glass

Ralf Bausinger, Andre Leopold, Stephan J. Zilker, Dietrich Haarer, Jolita Ostrauskaite, Mukundan Thelakkat

Proceedings Volume 4462, Nonlinear Optical Transmission Processes and Organic Photorefractive Materials; (2002) https://doi.org/10.1117/12.452737
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

The erasing dynamics of holographic gratings in a low molecular weight photorefractive glass depending on the sample temperature were investigated. Changes in the overall speed of the material by three orders of magnitude over a temperature range of 13 K were observed. We identified two distinct processes below the glass transition temperature T_g, a fast one on time scales of seconds and a slower one with lifetimes around 10³ s. We attribute the fast process to the electro-optic effect and the slower one to orientational diffusion processes of the glass molecules. Above T_g, the fast process vanishes, whereas the diffusional processes accelerate up to time constants in the range of seconds. This study shows, that an accurate temperature control is indispensable when measuring photorefractive dynamics, especially in the temperature range around T_g.

Citation Download Citation

Ralf Bausinger, Andre Leopold, Stephan J. Zilker, Dietrich Haarer, Jolita Ostrauskaite, and Mukundan Thelakkat "Temperature dependent measurements on a low-molecular-weight photorefractive glass", Proc. SPIE 4462, Nonlinear Optical Transmission Processes and Organic Photorefractive Materials, (16 January 2002); https://doi.org/10.1117/12.452737

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