Abstract
This study investigates a spatially band-tunable color-cone lasing emission (CCLE) based on a dye-doped cholesteric liquid crystal with a photoisomerizable chiral dopant (IBM). Experimental results show that the lasing band of the formed CCLE of the cell with a photoinduced pitch gradient can be spatially tuned among various color regions by adjusting the pumped position of the cell. The spatially band tunability of the laser results from the UV-irradiation-induced decrease of the helical twisting power of IBM via isomerization, accordingly shrinking the pitch of the cholesteric-liquid-crystal host. The total spatially tunable wavelength range for the laser exceeds .
© 2010 Optical Society of America
Full Article | PDF ArticleMore Like This
Shih-Hung Lin, Cang-Yi Shyu, Jui-Hsiang Liu, Po-Chih Yang, Ting-Shan Mo, Shuan-Yu Huang, and Chia-Rong Lee
Opt. Express 18(9) 9496-9503 (2010)
C.-R. Lee, S.-H. Lin, H.-C. Yeh, and T.-D. Ji
Opt. Express 17(25) 22616-22623 (2009)
C.-R. Lee, S.-H. Lin, H.-C. Yeh, T.-D. Ji, K.-L. Lin, T.-S. Mo, C.-T. Kuo, K.-Y. Lo, S.-H. Chang, Andy Y.-G. Fuh, and S.-Y. Huang
Opt. Express 17(15) 12910-12921 (2009)