Journal
APPLIED PHYSICS LETTERS
Volume 95, Issue 17, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3254229
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Funding
- NSFC [60678021, 10604033, 10804054, 10804055]
- 111 Project [B07013]
- MOE Cultivation Fund of the Key Scientific and Technical Innovation Project [708022]
- 973 Program [2007CB307002, 2010CB934101]
- CNKBRSF [2006CB921703]
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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. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3254229]
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