| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Stimulated Emission from a TiO2 Particle-Dispersed Dye Polymer Plane Waveguide |
WANG Qiong, YE Li-Hua, XI Jun, LU Chang-Gui, HU Guo-Hua, FANG Min,
CUI Yi-Ping |
| Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing 210096 |
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| Cite this article: |
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WANG Qiong, YE Li-Hua, XI Jun et al 2009 Chin. Phys. Lett. 26 017801 |
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Abstract We report the stimulated emission from a dye doped polymer plane waveguide with TiO2 particles. This waveguide consists of a poly (methylmethacrylate) (PMMA) film containing laser dye DCM as a gain medium. The emission spectrum of the film pumped by the Nd:YAG laser is different from the amplified spontaneous emission of the dye-doped film without particles. It is shown that when the excitation intensity reaches the threshold
9.6μJ, the broad band emission spectrum narrows into multiple separate peaks with central wavelength of 608nm. The linewidth of the sharp peak is 0.5nm. According to our analyses, this phenomenon is due to the multiscattering of the disordered TiO2 particles inside the gain polymer film.
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| Keywords:
78.45.-h
42.70.-a
78.66.-w
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Received: 12 September 2008
Published: 24 December 2008
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