Chinese Optics Letters, 2008, 6 (1): 0125, Published Online: Jan. 29, 2008  

In-situ measurement of the surface temperature during holographic recording Download: 931次

Author Affiliations
Department of Physics/Applied Physics, University of Duisburg-Essen, Lotharstr. 1, 47057 Duisburg, Germany2Département de chimie, Université de Sherbrooke, Sherbrooke, Québec, Canada J1K 2R13COPL, Département de physique, génie physique et optique, Université Laval, Québec, Canada G1K7P4
Abstract
Photo-induced processes in organic materials mostly occur on molecular levels. Excited molecules may split to form radicals, starting a polymerization process with diffusing monomers. The azo-dyes perform an optically induced cis-trans isomerization. During pattern formation like a holographic grating, the local temperature increase, especially in thin films, is up to date a subject of estimation from absorption and dissipation data. However, the exact knowledge of the surface temperature would help a lot in understanding the resulting refractive index and thickness patterns during holographic exposure. In this paper, in-situ pyrometer measurements are presented. As examples, different photosensitive materials, varying from a photopolymer to polycrystalline azo dyes, are used in order to outline the magnitude of this effect and demonstrate the feasibility of this technique.
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A. Draude, R. Meinhardt, H. Franke, Y. Zhao, R. A.. In-situ measurement of the surface temperature during holographic recording[J]. Chinese Optics Letters, 2008, 6(1): 0125.

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