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Song, Myoung Hoon
Organic Photonics & Optoelectronics Lab
Research Interests
  • Organic optoelectrics, perovskite light-emitting diodes, surface treatment, photonic crystals

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Lasing characteristics of a dye-doped nematic liquid crystal layer sandwiched by two polymeric cholesteric liquid crystals

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Title
Lasing characteristics of a dye-doped nematic liquid crystal layer sandwiched by two polymeric cholesteric liquid crystals
Author
Song, Myoung HoonPark, BShin, KCOhta, TTsunoda, YHoshi, HTakanishi, YIshikawa, KWatanabe, JNishimura, SToyooka, TZhu, ZGSwager, TMTakezoe, H
Keywords
photonic band gap;  polymer cholesteric liquid crystal;  defect mode;  lasing;  phase retardation;  polarization;  photopolymerization;  tunable lasing
Issue Date
2004
Publisher
SPIE
Citation
Proceedings of SPIE - The International Society for Optical Engineering, v.5518, no., pp.66 - 76
Abstract
We have studied the lasing characteristics from a dye-doped nematic layer sandwiched by two polymeric cholesteric liquid crystal (PCLC) films as photonic band gap materials. The nematic layer possessing birefringence brings about the following remarkable optical characteristics; (1) reflectance in the photonic band gap (PBG) region exceeds 50 % due to the retardation effect, being unpredictable from a single CLC film, (2) efficient lasing occurs either at the notch of PBG or at the photonic band edge, (3) the lasing emissions contain both right- and left-circular polarizations, and (4) tunable lasing can be achieved by the reorientation of nematic liquid crystal molecules under the application of an electric field.
URI
https://scholarworks.unist.ac.kr/handle/201301/9091
DOI
10.1117/12.562626
ISSN
0277-786X
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