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Tunable two-dimensional polarization grating using a self-organized micropixelated liquid crystal structure

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Title: Tunable two-dimensional polarization grating using a self-organized micropixelated liquid crystal structure
Authors: Amano, Reo Browse this author
Salamon, Péter Browse this author
Yokokawa, Shunsuke Browse this author
Kobayashi, Fumiaki Browse this author
Sasaki, Yuji Browse this author →KAKEN DB
Fujii, Shuji Browse this author →KAKEN DB
Buka, Ágnes Browse this author
Araoka, Fumito Browse this author
Orihara, Hiroshi Browse this author →KAKEN DB
Issue Date: 12-Dec-2018
Publisher: Royal Society of Chemistry
Journal Title: RSC advances
Volume: 8
Issue: 72
Start Page: 41472
End Page: 41479
Publisher DOI: 10.1039/c8ra08557a
Abstract: Utilization of the self-organizing nature of soft materials is promising for fabricating micro- and nano-structures, which can be applied for optics. Because of the high birefringence, liquid crystals are especially suitable for optoelectronic applications such as beam steering and polarization conversion. On the other hand, most self-organized patterns in liquid crystals are one-dimensional and there are only a few examples of two dimensional systems. Here we study the light diffraction from a micro-pixelated pattern of a nematic liquid crystal which is formed by self-organization of topological defects. We demonstrate that the system works as a tunable two dimensional optical grating, which splits the incident laser beam and changes the polarization property. The intensity can be controlled by electrical voltages, which cause extinction of the zeroth-order beam. The polarization properties depend on the location of spots. The numerical calculation and the theoretical analysis not only support the experimental results but also unveil the uniqueness of the pixelated structure.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 佐々木 裕司

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