Silicon oxides as alignment surfaces for vertically-aligned nematics in photonic devices

Otón Martínez, Eva and López de Andrés, Sol and Bennis, Noureddine and Otón Sánchez, José Manuel and Geday, Morten Andreas (2014). Silicon oxides as alignment surfaces for vertically-aligned nematics in photonic devices. "Opto-Electronics Review", v. 22 (n. 2); pp. 92-100. ISSN 1230-3402. https://doi.org/10.2478/s11772-014-0182-2.

Description

Title: Silicon oxides as alignment surfaces for vertically-aligned nematics in photonic devices
Author/s:
  • Otón Martínez, Eva
  • López de Andrés, Sol
  • Bennis, Noureddine
  • Otón Sánchez, José Manuel
  • Geday, Morten Andreas
Item Type: Article
Título de Revista/Publicación: Opto-Electronics Review
Date: June 2014
ISSN: 1230-3402
Volume: 22
Subjects:
Freetext Keywords: SiOx, SiO2, silicon oxides, vertically aligned nematics, photonic devices, morphology characterization
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Tecnología Fotónica y Bioingeniería
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

A comparative study on alignment performance and microstructure of inorganic layers used for liquid crystal cell conditioning has been carried out. The study has focused on two specific materials, SiOx and SiO2, deposited under different conditions. The purpose was to establish a relationship between layer microstructure and liquid crystal alignment. The surface morphology has been studied by FESEM and AFM. An analysis on liquid crystal alignment, pretilt angle, response time, contrast ratio and the conditions to develop backflow effect (significant rise time increase due to pure homeotropic alignment) on vertically-aligned nematic cells has been carried out. A technique to overcome the presence of backflow has been identified. The full comparative study of SiOx and SiO2 layer properties and their influence over liquid crystal alignment and electrooptic response is presented.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainTEC 2008-00147UnspecifiedUnspecifiedUnspecified
Madrid Regional GovernmentS2009/ESP-1781UnspecifiedUnspecifiedUnspecified

More information

Item ID: 37378
DC Identifier: http://oa.upm.es/37378/
OAI Identifier: oai:oa.upm.es:37378
DOI: 10.2478/s11772-014-0182-2
Official URL: http://link.springer.com/article/10.2478%2Fs11772-014-0182-2
Deposited by: Memoria Investigacion
Deposited on: 02 Sep 2015 16:34
Last Modified: 06 May 2020 09:29
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