Reference : Transmission polarized optical microscopy of short-pitch cholesteric liquid crystal shells
Scientific congresses, symposiums and conference proceedings : Paper published in a journal
Physical, chemical, mathematical & earth Sciences : Physics
Physics and Materials Science
http://hdl.handle.net/10993/28282
Transmission polarized optical microscopy of short-pitch cholesteric liquid crystal shells
English
Geng, Yong mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Noh, Junghyun mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Lagerwall, Jan mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
7-Mar-2016
Proceedings of SPIE - The International Society for Optical Engineering
International Society for Optical Engineering
9769
No
International
0277-786X
1996-756X
Bellingham
WA
Proceedings SPIE Photonics West 2016 (San Francisco)
2016
SPIE
San Francisco, California
USA
[en] Cholesteric liquid crystals ; optical rotation ; birefringence ; spherical shells ; helical structures
[en] We recently demonstrated that colloidal crystal arrangements of monodisperse droplets or shells of planar-aligned cholesteric liquid crystal exhibit intricate patterns of circularly polarized reflection spots of different colors. The spots appear as a result of photonic cross communication between droplets, hence the patterns reflect the macroscopic arrangement of droplets or shells. Apart from being an interesting optical phenomenon, it offers attractive application opportunities in photonics and beyond, due to the unique characteristics of the patterns. It turns out that the optical quality of shells is much enhanced compared to that of droplets, hence we focus our attention primarily on shells, of varying thickness. Here we analyze and explain the intriguing textures arising when studying planar-aligned short-pitch cholesteric shells in transmission polarizing optical microscopy. In this case, the texture reflects the properties of each individual shell, without any sign of cross communication, yet also this pattern holds some fascinating mysteries. These can only be elucidated by considering all the peculiar optical properties of cholesterics together, as well as the unusual situation given by the spherical shell geometry.
ERC (European Research Council) ; University of Luxembourg - UL
R-AGR-0505 > UNIQUE > 01/04/2015 - 31/03/2018 > LAGERWALL Jan
Researchers ; Professionals ; Students
http://hdl.handle.net/10993/28282
10.1117/12.2216132
H2020 ; 648763 - INTERACT - Intelligent Non-woven Textiles and Elastomeric Responsive materials by Advancing liquid Crystal Technology

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