Spatially band-tunable color-cone lasing emission in a dye-doped cholesteric liquid crystal with a photoisomerizable chiral dopant

C. R. Lee, S. H. Lin, H. S. Ku, J. H. Liu, P. C. Yang, C. Y. Huang, H. C. Yeh, T. D. Ji, C. H. Lin

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9 Citations (Scopus)

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 trans→cis isomerization, accordingly shrinking the pitch of the cholesteric-liquid-crystal host. The total spatially tunable wavelength range for the laser exceeds 100 nm.

Original languageEnglish
Pages (from-to)1398-1400
Number of pages3
JournalOptics Letters
Volume35
Issue number9
DOIs
Publication statusPublished - 2010 May 1

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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