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|Title:||Gain narrowing and random lasing from dye-doped polymer-dispersed liquid crystals with nanoscale liquid crystal droplets||Authors:||Liu, Y.J.
|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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