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Polarization characteristics of phase retardation defect mode lasing in polymeric cholesteric liquid crystals
- Source :
-
Science & Technology of Advanced Materials . Jul2004, Vol. 5 Issue 4, p437-441. 5p. - Publication Year :
- 2004
-
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. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 14686996
- Volume :
- 5
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Science & Technology of Advanced Materials
- Publication Type :
- Academic Journal
- Accession number :
- 13661538
- Full Text :
- https://doi.org/10.1016/j.stam.2004.01.020