期刊
OPTICAL MATERIALS
卷 31, 期 2, 页码 375-379出版社
ELSEVIER
DOI: 10.1016/j.optmat.2008.05.014
关键词
Cellulose; Cholesteric liquid crystal polymer; Optical scattering; Random lasing; Rhodamine 6G
资金
- National Natural Science Foundation of China [50473057, 20374055, 50521302]
- Chinese Academy of Sciences [KJCX2-SW-H07]
Random lasing ill rhodamine 6G (R6G) doped ethyl-cryanoethyl cellulose [(E-CE)C]/acrylic acid (AA) cholesteric liquid crystal (LC) solution without scattering particles was studied. The effects of concentration of (E-CE)C/AA solution and the thickness of the sample on the random lasing were investigated. The random laser with coherent feedback Occurs in (E-CE)C/AA anisotropic solution, while only amplified spontaneous emission (ASE) is observed in (E-CE)C/AA isotropic solution and AA solvent. The random laser also Occurs in the (E-CE)C/poly(acrylic acid) (PAA)/R6G solid film with cholesteric structure through quick polymerization of AA. The experimental results suggest that the cholesteric LC domains play a very important role in this random lasing. (C) 2008 Elsevier B.V. All rights reserved.
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