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Proceedings Paper

Backward propagation of light pulse in phthalocyanin gallium PMMA at room temperature
Author(s): Hao Wang; Chunguang Zhang
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Paper Abstract

Light speed control had been an interesting issue in recent years. In this work, the authors experimentally observed the backward propagation of light pulse in Phthalocyanin Gallium polymethyl methacrylate (PMMA) at room temperature, firstly. Taking use of the modulation technique, we got the time advancement of 260 μs when the sample length was 2 mm long and the modulation frequency was 50 Hz, the corresponding group velocity was -7.69m/s. The phenomenon of backward propagation was a direct result of negative group velocity. And the energy flow still traveled in the forward direction in the sample although the light propagated with a negative group velocity.

Paper Details

Date Published: 5 November 2010
PDF: 6 pages
Proc. SPIE 7846, Quantum and Nonlinear Optics, 784616 (5 November 2010); doi: 10.1117/12.870713
Show Author Affiliations
Hao Wang, Fujian Normal Univ. (China)
Chunguang Zhang, Fujian Normal Univ. (China)


Published in SPIE Proceedings Vol. 7846:
Quantum and Nonlinear Optics
Qihuang Gong; Guang-Can Guo; Yuen-Ron Shen, Editor(s)

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