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Angular dependent spontaneous emission in cholesteric liquid-crystal films
Author(s): Anna M. Risse; Jürgen Schmidtke
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Paper Abstract

Due to the presence of a polarization-sensitive photonic band gap, cholesteric liquid crystals (CLCs) strongly modify the emission of fluorescent guest molecules, which makes them promising candidates for coherent or incoherent light sources with unique polarization properties. We present a systematic study of the angular dependent spontaneous emission properties of CLC films doped with a fluorescent dye. Our main findings are: (1) wavelength intervals of almost complete emission suppression due to the emergence of a polarizationinsensitive band gap at large detection angles; (2) additional band-edge resonance peaks almost completely dominating emission in certain angular ranges; and (3) striking angular and wavelength dependent polarization variations.

Paper Details

Date Published: 1 March 2019
PDF: 7 pages
Proc. SPIE 10941, Emerging Liquid Crystal Technologies XIV, 109410M (1 March 2019); doi: 10.1117/12.2506756
Show Author Affiliations
Anna M. Risse, Univ. Paderborn (Germany)
Jürgen Schmidtke, Univ. Paderborn (Germany)

Published in SPIE Proceedings Vol. 10941:
Emerging Liquid Crystal Technologies XIV
Liang-Chy Chien, Editor(s)

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