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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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Polarization characteristics of phase retardation defect mode lasing in polymeric cholesteric liquid crystals

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Title
Polarization characteristics of phase retardation defect mode lasing in polymeric cholesteric liquid crystals
Author
Song, Myoung HoonShin, KCPark, BTakanishi, YIshikawa, KWatanabe, JNishimura, SToyooka, TZhu, ZGSwager, TMTakezoe, H
Keywords
Defect mode; Lasing; Phase retardation; Photonic band gap; Polarization; Polymer cholesteric liquid crystal
Issue Date
2004-07
Publisher
NATL INST MATERIALS SCIENCE
Citation
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS, v.5, no.4, pp.437 - 441
Abstract
We have studied the lasing characteristics of a dye-doped nematic layer sandwiched by two polymeric cholesteric liquid crystal (CLC) films as photonic band gap (PBG) materials. The nematic layer acts as a defect layer, the anisotropy of which brings about the following remarkable optical characteristics: (1) reflectance in the PBG region exceeds 50% due to the retardation effect, being unpredictable from a single CLC film; (2) efficient lasing occurs either at the defect mode wavelength or at the photonic band edge; and (3) the lasing emission due to both the defect mode and the photonic band edge mode contains both right- and left-circular polarizations, while the lasing emission from a dye-doped single CLC layer with a left-handed helix is left-circularly polarized.
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DOI
10.1016/j.stam.2004.01.020
ISSN
1468-6996
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MSE_Journal Papers
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