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Molecular Dynamics Study of Photochromic Molecules Probed by the Mask Pattern Transferred Transient Grating Technique

Research Area: Nanofabrication Year: 2005
Type of Publication: Article Keywords: pattern transfer, optical heterodyne detection, transient grating
Authors: Koichi Okamoto; Terrell Neal; Zhaoyu Zhang; D. T. Wei; Axel Scherer
Journal: Chemical Physics Letters Volume: 414
Number: 1-3 Pages: 155-160
Month: October
Mask pattern transferred transient grating, which is a convenient new technique in the class of optical heterodyne detected transient grating, is applied to photochromic molecule (spiropyran) in 2-propanol solution. The spatial modulations of optical properties of the material is generated by transferring an ultra-violet light pattern directly from a metal film grating into the sample solution and detected through the diffraction of a probe beam. The thermal conductivity of the solvent and the diffusion coefficients of the solute molecules were obtained and compared with the calculated values. This method has many advantages compared to the conventional techniques.
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