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Photofabrication of Surface Relief Gratings Using Photodynamic Polymers

We present novel observation and detailed investigation of a photodynamic polymer transport process. Surface gratings were photofabricated on various polymer films containing azo groups in the side chain or in the main chain. Effects of the polymer structures on the formation of the surface gratings...

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Main Authors:	Tripathy, S. K, Kim, D. Y, Jiang, X. L, Li, L, Lee, T. S
Format:	Report
Language:	English
Subjects:	AZOBENZENES CHROMOPHORES ELECTRIC FIELDS GRADIENT FORCE GRATINGS(SPECTRA) MODULATION MOLECULAR STRUCTURE Optics Physical Chemistry POLYMERIC FILMS SURFACE CHEMISTRY SURFACE RELIEF GRATING
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creator	Tripathy, S. K Kim, D. Y Jiang, X. L Li, L Lee, T. S
description	We present novel observation and detailed investigation of a photodynamic polymer transport process. Surface gratings were photofabricated on various polymer films containing azo groups in the side chain or in the main chain. Effects of the polymer structures on the formation of the surface gratings were investigated. Large surface modulation (>6000 A) and high diffraction efficiency (>40%) could be obtained under optimal conditions. Fabrication of various multiple gratings on the same spot was demonstrated. The resulting pattern was a simple superposition of all the interfering recording waves. The surface pattern mimics the light pattern and gradient forces acting on the azo dipoles are responsible for the large scale displacement of the polymer surface. Chromophores molecules on the viscous surface layers are plasticized by trans-cis- trans isomerization and are dragged by "optical tweezer" effect of the electric field gradient.
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S ; MASSACHUSETTS UNIV LOWELL DEPT OF CHEMISTRY</creatorcontrib><description>We present novel observation and detailed investigation of a photodynamic polymer transport process. Surface gratings were photofabricated on various polymer films containing azo groups in the side chain or in the main chain. Effects of the polymer structures on the formation of the surface gratings were investigated. Large surface modulation (>6000 A) and high diffraction efficiency (>40%) could be obtained under optimal conditions. Fabrication of various multiple gratings on the same spot was demonstrated. The resulting pattern was a simple superposition of all the interfering recording waves. The surface pattern mimics the light pattern and gradient forces acting on the azo dipoles are responsible for the large scale displacement of the polymer surface. 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subjects	AZOBENZENES CHROMOPHORES ELECTRIC FIELDS GRADIENT FORCE GRATINGS(SPECTRA) MODULATION MOLECULAR STRUCTURE Optics Physical Chemistry POLYMERIC FILMS SURFACE CHEMISTRY SURFACE RELIEF GRATING
title	Photofabrication of Surface Relief Gratings Using Photodynamic Polymers
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