Title | Polarization characteristics of phase retardation defect mode lasing in polymeric cholesteric liquid crystals |
Publication Type | Journal Article |
Year of Publication | 2004 |
Authors | Song, MH, Shin, K-C, Park, B, Takanishi, Y, Ishikawa, K, Watanabe, J, Nishimura, S, Toyooka, T, Zhu, Z, Swager, TM, Takezoe, H |
Journal | Science and Technology of Advanced Materials |
Volume | 5 |
Pagination | 437–441 |
Date Published | jul |
ISSN | 1468-6996 |
Keywords | polarization phase retardation defect lasing polymeric cholesteric liq crystal |
Abstract | The lasing characteristics were studied of a dye-doped nematic layer sandwiched by 2 polymeric cholesteric liq. 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. [on SciFinder(R)] |
URL | http://stacks.iop.org/1468-6996/5/i=4/a=A09?key=crossref.32d6cdbca08d98140fb1fe5e431969b0 |
DOI | 10.1016/j.stam.2004.01.020 |