| Title | Effect of thick anisotropic NLC layer on lasing in polymeric cholesteric liquid crystals. |
| Publication Type | Journal Article |
| Year of Publication | 2005 |
| Authors | Song, MH, Shin, K-C, Park, B, Takanishi, Y, Ishikawa, K, Watanabe, J, Takezoe, H, Nishimura, S, Toyooka, T, Zhu, Z, Swager, TM |
| Journal | Journal of the Korean Physical Society |
| Volume | 46 |
| Pagination | S265–S268 |
| ISSN | 0374-4884 |
| Keywords | polymeric cholesteric liq crystal lasing anisotropic NLC layer effect |
| Abstract | We have studied the lasing characteristics from a dye-doped nematic liq. crystal layer sandwiched by two polymeric cholesteric liq. 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 (PEG) region exceeds 50 %, due to the retardation effect, being unpredictable from a single CLC film; (2) efficient lasing occurs at the notch of PEG; (3) the lasing emissions contain both right- and left-circular polarizations. In this study, we demonstrate that a 100-$μ$m-thick nematic liq. crystal layer system shows several dips, resulting in multi-mode lasing actions just at the dips within PBG. [on SciFinder(R)] |