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Paper Abstract and Keywords
Presentation 2014-01-25 11:22
Evaluation of flexoelectric coefficients by using the SOITE method
Taiki Watanabe (Nagaoka Univ. of Tech.), Taiju Takahashi (Kougakuin Univ.), Munehiro Kimura, Tadashi Akahane (Nagaoka Univ. of Tech.) EID2013-31 Link to ES Tech. Rep. Archives: EID2013-31
Abstract (in Japanese) (See Japanese page) 
(in English) It is well known that the electric polarization arises from the bend or spray distortion of the orientation. This phenomenon is called flexoelectric effect. Up to today, several kinds of measurement methods of the flexoelectric coefficient have been reported. However, the sign and/or the absolute value of the measured flexoelectric coefficient were different between the reports with regards to the common material. In this study, flexoelectric coefficient was investigated by the symmetric oblique incidence transmission Ellipsometry (SOITE). The state of polarization of the transmitted light through a hybrid aligned liquid crystal cell is changed by the applied DC electric field and the director reorientation. The outstanding feature of the SOITE is that the multiple reflection and multiple interference can be offset. We propose that the cell thickness and sum of the flexoelectric coefficients (e11+e33) can be obtained by experiment and numerical fitting procedure.
Keyword (in Japanese) (See Japanese page) 
(in English) Liquid crystal / flexoelectric effect / ellipsometry / / / / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 408, EID2013-31, pp. 125-128, Jan. 2014.
Paper # EID2013-31 
Date of Issue 2014-01-17 (EID) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF EID2013-31 Link to ES Tech. Rep. Archives: EID2013-31

Conference Information
Conference Date 2014-01-24 - 2014-01-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Niigata University 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EID 
Conference Code 2014-01-EID-IDY-SSL-EDD-JC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Evaluation of flexoelectric coefficients by using the SOITE method 
Sub Title (in English)  
Keyword(1) Liquid crystal  
Keyword(2) flexoelectric effect  
Keyword(3) ellipsometry  
1st Author's Name Taiki Watanabe  
1st Author's Affiliation Nagaoka University of Technology (Nagaoka Univ. of Tech.)
2nd Author's Name Taiju Takahashi  
2nd Author's Affiliation Kogakuin University (Kougakuin Univ.)
3rd Author's Name Munehiro Kimura  
3rd Author's Affiliation Nagaoka University of Technology (Nagaoka Univ. of Tech.)
4th Author's Name Tadashi Akahane  
4th Author's Affiliation Nagaoka University of Technology (Nagaoka Univ. of Tech.)
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Speaker Author-1 
Date Time 2014-01-25 11:22:00 
Presentation Time 8 minutes 
Registration for EID 
Paper # EID2013-31 
Volume (vol) vol.113 
Number (no) no.408 
Page pp.125-128 
Date of Issue 2014-01-17 (EID) 

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