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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 |
Appears in Collections: | Staff Publications |
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