Electrically and all-optically controllable random lasers based on dye-doped liquid crystal films

Chia-Rong Lee, Jia De Lin, Bo Yuang Huang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This study elucidates electrically and all-optically controllable random lasers in dye-doped liquid crystals with adding a photoisomerizable dye. The lasing intensities and the energy thresholds of the random lasers can be electrically controlled below the Fréedericksz transition threshold or all-optically controlled sequentially with a two-step exposure of UV and green beams. The below-threshold-electric- and all-optical controllabilities of the random lasers are attributable to the effective change of the spatial fluctuation of the orientational order and thus of the dielectric tensor of LCs by changing the electric-field-aligned order of LCs below the threshold and via the isothermal nematic-isotropic phase transition of LCs, respectively; thereby changing the diffusion constant and thus the scattering strength of the fluorescence photons in their recurrent multiple scattering. This can result in the change in the lasing intensity and thus the energy threshold of the random lasers.

Original languageEnglish
Title of host publicationEmerging Liquid Crystal Technologies VII
Volume8279
DOIs
Publication statusPublished - 2012
EventEmerging Liquid Crystal Technologies VII - San Francisco, CA, United States
Duration: 2012 Jan 222012 Jan 25

Other

OtherEmerging Liquid Crystal Technologies VII
CountryUnited States
CitySan Francisco, CA
Period12-01-2212-01-25

Fingerprint

Liquid Crystals
Dyes
doped crystals
Liquid Crystal
Liquid crystals
Coloring Agents
dyes
liquid crystals
Laser
thresholds
Lasers
lasers
lasing
Multiple scattering
Controllability
Multiple Scattering
controllability
Tensors
Energy
scattering

All Science Journal Classification (ASJC) codes

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Lee, C-R., Lin, J. D., & Huang, B. Y. (2012). Electrically and all-optically controllable random lasers based on dye-doped liquid crystal films. In Emerging Liquid Crystal Technologies VII (Vol. 8279). [82790B] https://doi.org/10.1117/12.913961
Lee, Chia-Rong ; Lin, Jia De ; Huang, Bo Yuang. / Electrically and all-optically controllable random lasers based on dye-doped liquid crystal films. Emerging Liquid Crystal Technologies VII. Vol. 8279 2012.
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Lee, C-R, Lin, JD & Huang, BY 2012, Electrically and all-optically controllable random lasers based on dye-doped liquid crystal films. in Emerging Liquid Crystal Technologies VII. vol. 8279, 82790B, Emerging Liquid Crystal Technologies VII, San Francisco, CA, United States, 12-01-22. https://doi.org/10.1117/12.913961

Electrically and all-optically controllable random lasers based on dye-doped liquid crystal films. / Lee, Chia-Rong; Lin, Jia De; Huang, Bo Yuang.

Emerging Liquid Crystal Technologies VII. Vol. 8279 2012. 82790B.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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