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- Song, Myoung Hoon
- Organic Photonics & Optoelectronics Lab.
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Polarization characteristics of phase retardation defect mode lasing in polymeric cholesteric liquid crystals
- Author(s)
- Song, Myoung Hoon, Shin, KC, Park, B, Takanishi, Y, Ishikawa, K, Watanabe, J, Nishimura, S, Toyooka, T, Zhu, ZG, Swager, TM, Takezoe, H
- Issued Date
- 2004-07
- 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.
- Publisher
- NATL INST MATERIALS SCIENCE
- ISSN
- 1468-6996
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