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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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Effect of Thick Anisotropic NLC Layer on Lasing in Polymeric Cholesteric Liquid Crystals

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Title
Effect of Thick Anisotropic NLC Layer on Lasing in Polymeric Cholesteric Liquid Crystals
Author
Song, Myoung HoonZhu, ZhengguoIhikawa, KenTakezoe, HideoPark, ByoungchooWatanabe, Junjihin, Ki-ChulNihimura, uzuhiToyooka, Takehirowager, Timothy M.Takanihi, Yoichi
Keywords
Photonic band gap; Polymer cholesteric liquid crystal; Defect mode; Lasing; Phase retardation; Polarization; Nematic liquid crystal
Issue Date
2005
Publisher
KOREAN PHYSICAL SOC
Citation
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.46, no.2, pp.265 - 268
Abstract
We have studied the lasing characteristics from a dye-doped nematic liquid crystal layer sandwiched by two polymeric cholesteric liquid crystal 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 at the notch of PBG; (3) the lasing emissions contain both right- and left-circular polarizations. In this study, we demonstrate that a 100-μm-thick nematic liquid crystal layer system shows several dips, resulting in multi-mode lasing actions just at the dips within PBG.
URI
https://scholarworks.unist.ac.kr/handle/201301/7458
ISSN
0374-4884
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