Three-dimensional crystal orientation of blue phase liquid crystals on surfaces

Yoshida, H.; Takahashi, M.; Ohkawa, T.; Fukuda, J-i.; Kikuchi, H.; Ozaki, M.

doi:https://doi.org/10.1117/12.2323159

Three-dimensional crystal orientation of blue phase liquid crystals on surfaces

Yoshida, H.; Takahashi, M.; Ohkawa, T. et al.

Proceedings of SPIE - The International Society for Optical Engineering, 2018, 10735, 107350I

Number of Access:944（2025-09-02 10:25 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/76958

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Title	Three-dimensional crystal orientation of blue phase liquid crystals on surfaces
Creator	NRID 1000080550045 1000080550045 researchmap permalink hiroyukiyoshida hiroyukiyoshida Scopus Author ID 55628543086 55628543086 CreatorName Yoshida, H.
	CreatorName Takahashi, M.
	CreatorName Ohkawa, T.
	NRID 1000090392654 1000090392654 CreatorName Fukuda, J-i.
	NRID 1000050186201 1000050186201 CreatorName Kikuchi, H.
	NRID 1000050204186 1000050204186 ORCID 0000-0002-9556-4225 0000-0002-9556-4225 researchmap permalink read0014092 read0014092 Scopus Author ID 55490143900 55490143900 CreatorName Ozaki, M.
Subject	blue phase
	liquid crystal
	crystal orientation
	phase transition
	Kossel diagram
Description	SPIE Organic Photonics + Electronics, 2018, San Diego, California, United States
Description	H. Yoshida, M. Takahashi, T. Ohkawa, J.-i. Fukuda, H. Kikuchi, and M. Ozaki "Three-dimensional crystal orientation of blue phase liquid crystals on surfaces", Proc. SPIE 10735, Liquid Crystals XXII, 107350I (14 September 2018). https://doi.org/10.1117/12.2323159
Abstract	Liquid crystalline cholesteric blue phases (BPs) are of high interest for tunable electro-optic applications owing to their fast response times and quasi-polarization-independent phase modulation capabilities. Various approaches have recently been proposed to control the crystal orientation of BPs on substrates, but their basic orientation properties on standard, unidirectionally orienting substrates had not been investigated in detail. Here, detailed studies have been made on the Kossel diagrams of BPs on unidirectionally orienting substrates to understand the three-dimensional crystal orientation of BPs. We find that BPs show strong thermal hysteresis and that the structure of the preceding phase determines the orientation of BPs. Specifically, the BP II – I transition is accompanied by a rotation of the crystal such that the crystal direction defined by certain low-value Miller indices transform into different directions, and within the allowed rotations, different azimuthal configurations are obtained in the same cell depending on the thermal process. Our findings demonstrate that, for the alignment control of BPs, the thermal process is as important as the properties of the alignment layer.
Publisher	SPIE
Source Title	Proceedings of SPIE - The International Society for Optical Engineering
Volume (Issue)	10735
Page	107350I
Date of Issued	2018-09-14
Language	English
Handle URL	https://hdl.handle.net/11094/76958
PISSN	0277786X
NCID	AA10619755
Relation.isIdenticalTo	DOI (Publisher Version) https://doi.org/10.1117/12.2323159
Access Rights	open access
oaire:version	Version of Record
Category	会議発表論文 Conference Paper

Resource Type	conference paper
Local Type	Conference Paper
DCMI Type	Text
DCTERMS.bibliographicCitation	Proceedings of SPIE - The International Society for Optical Engineering. 2018, 10735, p. 107350I
DC.title	Three-dimensional crystal orientation of blue phase liquid crystals on surfaces
DC.creator	Yoshida, H.
	Takahashi, M.
	Ohkawa, T.
	Fukuda, J-i.
	Kikuchi, H.
	Ozaki, M.
DC.publisher	SPIE
DC.language' scheme='DCTERMS.RFC1766	English
DC.type' scheme='DCTERMS.DCMIType	Text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2018-09-14
DC.identifier	https://doi.org/10.1117/12.2323159
DC.subject	blue phase
	liquid crystal
	crystal orientation
	phase transition
	Kossel diagram
DC.description	SPIE Organic Photonics + Electronics, 2018, San Diego, California, United States
DC.description	H. Yoshida, M. Takahashi, T. Ohkawa, J.-i. Fukuda, H. Kikuchi, and M. Ozaki "Three-dimensional crystal orientation of blue phase liquid crystals on surfaces", Proc. SPIE 10735, Liquid Crystals XXII, 107350I (14 September 2018). https://doi.org/10.1117/12.2323159
DCTERMS.abstract	Liquid crystalline cholesteric blue phases (BPs) are of high interest for tunable electro-optic applications owing to their fast response times and quasi-polarization-independent phase modulation capabilities. Various approaches have recently been proposed to control the crystal orientation of BPs on substrates, but their basic orientation properties on standard, unidirectionally orienting substrates had not been investigated in detail. Here, detailed studies have been made on the Kossel diagrams of BPs on unidirectionally orienting substrates to understand the three-dimensional crystal orientation of BPs. We find that BPs show strong thermal hysteresis and that the structure of the preceding phase determines the orientation of BPs. Specifically, the BP II – I transition is accompanied by a rotation of the crystal such that the crystal direction defined by certain low-value Miller indices transform into different directions, and within the allowed rotations, different azimuthal configurations are obtained in the same cell depending on the thermal process. Our findings demonstrate that, for the alignment control of BPs, the thermal process is as important as the properties of the alignment layer.
DC.format	76958
citation_title	Three-dimensional crystal orientation of blue phase liquid crystals on surfaces
citation_author	Yoshida, H.
	Takahashi, M.
	Ohkawa, T.
	Fukuda, J-i.
	Kikuchi, H.
	Ozaki, M.
citation_publisher	SPIE
citation_language	English
citation_date	2018-09-14
citation_journal_title	Proceedings of SPIE - The International Society for Optical Engineering
citation_volume	10735
citation_firstpage	107350I
citation_doi	https://doi.org/10.1117/12.2323159
citation_public_url	https://hdl.handle.net/11094/76958

Three-dimensional crystal orientation of blue phase liquid crystals on surfaces

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