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Experimental observation of subluminal and superluminal light propagation in rhodamine 6G-doped polymethyl methacrylate

Appl. Phys. Lett. 95, 171106 (2009); doi:10.1063/1.3254229

Published 28 October 2009

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Wending Zhang,1,2 Feng Gao,1,2 Guoquan Zhang,1,2 Wei Li,1,2 Xinzheng Zhang,1,2 and Jingjun Xu1,2
1The MOE Key Laboratory of Weak Light Nonlinear Photonics, Nankai University, Tianjin 300457, People's Republic of China
2Photonics Center, School of Physics, Nankai University, Tianjin 300071, People's Republic of China

Nondegenerate two-wave coupling process and group velocity change in the paraxial part of an intensity-modulated and focused transverse electromagnetic beam (TEM00 beam in the article) was observed in the rhodamine 6G(R6G)-doped polymethyl methacrylate (PMMA) but not in the pure PMMA. The typical superluminal result was −5.1 m/s and the subluminal result was 9.19 m/s, respectively. Furthermore, the results provide a support to our former conclusion that nondegenerate two-wave couplinglike mechanism could be used to change the group velocity of the paraxial part of a focused TEM00 beam in materials with nondegenerate two-wave coupling process. ©2009 American Institute of Physics
History: Received 26 June 2009; accepted 12 September 2009; published 28 October 2009
Permalink: http://link.aip.org/link/?APPLAB/95/171106/1
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KEYWORDS and PACS

Keywords
PACS
  • 42.70.Jk
    Optical polymers and other organic optical materials
  • 42.65.Hw
    Phase conjugation; photorefractive and Kerr effects
  • YEAR: 2009

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ISSN:
0003-6951 (print)   1077-3118 (online)
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