Fabrication of micro-grating structures by direct laser writing based on two photon process and their liquid crystal alignment abilities

Lee, Chee Heng; Yoshida, Hiroyuki; Miura, Yusuke; Fujii, Akihiko; Ozaki, Masanori

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タイトル	Fabrication of micro-grating structures by direct laser writing based on two photon process and their liquid crystal alignment abilities
著者	Lee, Chee Heng Lee, Chee Heng
	Yoshida, Hiroyuki Yoshida, Hiroyuki
	Miura, Yusuke Miura, Yusuke
	Fujii, Akihiko Fujii, Akihiko
	Ozaki, Masanori Ozaki, Masanori
キーワード等	photo-fabrication
	liquid crystal alignment
	two photon excitation
	grating
抄録	The authors have demonstrated the local alignment of nematic liquid crystal with local micro-grating structure fabricated by the curing of an ultraviolet curable material via a three dimensional micro-fabrication technique known as two photon excitation direct laser writing [1]. The molecular alignment of the nematic liquid crystals on the fabricated micro-grating structures was firstly investigated by the observations of a local twisted nematic region in a liquid crystal cell made of a substrate with locally fabricated micro-grating structure and a counter substrate with rubbed polyimide. The optical polarizing microscope observation of the micro-grating structures indicated that liquid crystals molecules have aligned parallel to the grooves of the micro-grating structure and that local alignment was successfully achieved. The alignment characteristics of the liquid crystals on these micro-gratings was also investigated and discussed quantitatively in details through the measurement of anchoring energy by the conventional torque balance method and the Berreman method. The azimuthal anchoring energy for the micro-grating was found to be in the order of 10-6 J/m2 and inversely proportional to the grating period.
公開者	電子情報通信学会
公開者の別表記	The Institute of Electronics, Information and Communication Engineers
掲載誌名	IEICE Transactions on Electronics
巻	E91-C
号	10
開始ページ	1581
終了ページ	1586
刊行年月	2008-10-01
ISSN	09168524
ISSN	17451353
NCID	AA10826283
URL	http://hdl.handle.net/11094/75684
権利情報	copyright©2008 IEICE
言語	英語
カテゴリ	学術雑誌論文 Journal Article

著者版フラグ	publisher
NII資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
dcmi資源タイプ	text
DCTERMS.bibliographicCitation	Physical review B.66(7) P.075214-P.075214
DC.title	Fabrication of micro-grating structures by direct laser writing based on two photon process and their liquid crystal alignment abilities
DC.creator	Lee, Chee Heng
	Yoshida, Hiroyuki
	Miura, Yusuke
	Fujii, Akihiko
	Ozaki, Masanori
DC.publisher	電子情報通信学会
DC.language" scheme="DCTERMS.RFC1766	英語
DCTERMS.issued" scheme="DCTERMS.W3CDTF	2008-10-01
DC.identifier" scheme="DCTERMS.URI	http://hdl.handle.net/11094/75684
DC.subject	photo-fabrication
	liquid crystal alignment
	two photon excitation
	grating
DCTERMS.abstract	The authors have demonstrated the local alignment of nematic liquid crystal with local micro-grating structure fabricated by the curing of an ultraviolet curable material via a three dimensional micro-fabrication technique known as two photon excitation direct laser writing [1]. The molecular alignment of the nematic liquid crystals on the fabricated micro-grating structures was firstly investigated by the observations of a local twisted nematic region in a liquid crystal cell made of a substrate with locally fabricated micro-grating structure and a counter substrate with rubbed polyimide. The optical polarizing microscope observation of the micro-grating structures indicated that liquid crystals molecules have aligned parallel to the grooves of the micro-grating structure and that local alignment was successfully achieved. The alignment characteristics of the liquid crystals on these micro-gratings was also investigated and discussed quantitatively in details through the measurement of anchoring energy by the conventional torque balance method and the Berreman method. The azimuthal anchoring energy for the micro-grating was found to be in the order of 10-6 J/m2 and inversely proportional to the grating period.
DC.rights	copyright©2008 IEICE
citation_title	Fabrication of micro-grating structures by direct laser writing based on two photon process and their liquid crystal alignment abilities
citation_author	Lee, Chee Heng
	Yoshida, Hiroyuki
	Miura, Yusuke
	Fujii, Akihiko
	Ozaki, Masanori
citation_publisher	電子情報通信学会
citation_language	英語
citation_date	2008-10-01
citation_journal_title	IEICE Transactions on Electronics
citation_volume	E91-C
citation_issue	10
citation_firstpage	1581
citation_lastpage	1586
citation_issn	09168524
citation_issn	17451353
citation_public_url	http://hdl.handle.net/11094/75684
citation_keywords	photo-fabrication
	liquid crystal alignment
	two photon excitation
	grating

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