Please use this identifier to cite or link to this item: https://doi.org/10.1063/1.2219988
Title: Gain narrowing and random lasing from dye-doped polymer-dispersed liquid crystals with nanoscale liquid crystal droplets
Authors: Liu, Y.J.
Sun, X.W.
Elim, H.I. 
Ji, W. 
Issue Date: 2006
Citation: Liu, Y.J., Sun, X.W., Elim, H.I., Ji, W. (2006). Gain narrowing and random lasing from dye-doped polymer-dispersed liquid crystals with nanoscale liquid crystal droplets. Applied Physics Letters 89 (1) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.2219988
Abstract: Dye-doped polymer-dispersed liquid crystals have been studied for random lasing. The dye-doped polymer-dispersed liquid crystal film was fabricated by photoinitiated polymerization with a collimated 514.5 nm Ar+ laser beam. Scanning electron microscopy analysis showed that most liquid crystal droplets in polymer matrix ranged from 20 to 80 nm. Gain narrowing and random lasing from dye-doped polymer dispersed liquid crystals were observed under the excitation of a frequency-doubled Nd:YAG (yttrium aluminum garnet) laser operating at a wavelength of 532 nm. The possible mechanism was proposed to explain the random lasing. The threshold of the random lasing was about 25 μJ/pulse. The linewidth of the lasing peaks was about 1 nm. With the film thickness of 6.5 μm, the lasing mode was nearly transverse electric polarized. © 2006 American Institute of Physics.
Source Title: Applied Physics Letters
URI: http://scholarbank.nus.edu.sg/handle/10635/96688
ISSN: 00036951
DOI: 10.1063/1.2219988
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