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Direct optical observation of walls and disclination effects in active photonic devices

Liquid crystal tunable Bragg Gratings defined in planar substrates via a laser patterning technique exhibit complex wavelength tuning. This tuning displays threshold points and hysteresis. These tuning features are shown to be a manifestation of physical processes occurring in the confined geometry...

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Main Authors: Snow, B.D., Adikan, Faisal Rafiq Mahamd, Gates, J.C., Gawith, C.B.E., Dyadyusha, A., Major, H.E., Kaczmarek, M., Smith, P.G.R.
Format: Article
Published: 2009
Subjects:
TK Electrical engineering. Electronics Nuclear engineering
Online Access:http://eprints.um.edu.my/4674/
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spelling my.um.eprints.46742018-10-11T01:45:50Z http://eprints.um.edu.my/4674/ Direct optical observation of walls and disclination effects in active photonic devices Snow, B.D. Adikan, Faisal Rafiq Mahamd Gates, J.C. Gawith, C.B.E. Dyadyusha, A. Major, H.E. Kaczmarek, M. Smith, P.G.R. TK Electrical engineering. Electronics Nuclear engineering Liquid crystal tunable Bragg Gratings defined in planar substrates via a laser patterning technique exhibit complex wavelength tuning. This tuning displays threshold points and hysteresis. These tuning features are shown to be a manifestation of physical processes occurring in the confined geometry of our tunable devices. Such physical processes include the formation and removal of line disclinations and an associated wall. We discuss the effect of walls in the liquid crystal with regards to voltage tuning characteristics and whether they may allow faster wavelength tuning. 2009 Article PeerReviewed Snow, B.D. and Adikan, Faisal Rafiq Mahamd and Gates, J.C. and Gawith, C.B.E. and Dyadyusha, A. and Major, H.E. and Kaczmarek, M. and Smith, P.G.R. (2009) Direct optical observation of walls and disclination effects in active photonic devices. Molecular Crystals and Liquid Crystals, 502. pp. 178-184. ISSN 1542-1406
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic TK Electrical engineering. Electronics Nuclear engineering
spellingShingle TK Electrical engineering. Electronics Nuclear engineering
Snow, B.D.
Adikan, Faisal Rafiq Mahamd
Gates, J.C.
Gawith, C.B.E.
Dyadyusha, A.
Major, H.E.
Kaczmarek, M.
Smith, P.G.R.
Direct optical observation of walls and disclination effects in active photonic devices
description Liquid crystal tunable Bragg Gratings defined in planar substrates via a laser patterning technique exhibit complex wavelength tuning. This tuning displays threshold points and hysteresis. These tuning features are shown to be a manifestation of physical processes occurring in the confined geometry of our tunable devices. Such physical processes include the formation and removal of line disclinations and an associated wall. We discuss the effect of walls in the liquid crystal with regards to voltage tuning characteristics and whether they may allow faster wavelength tuning.
format Article
author Snow, B.D.
Adikan, Faisal Rafiq Mahamd
Gates, J.C.
Gawith, C.B.E.
Dyadyusha, A.
Major, H.E.
Kaczmarek, M.
Smith, P.G.R.
author_facet Snow, B.D.
Adikan, Faisal Rafiq Mahamd
Gates, J.C.
Gawith, C.B.E.
Dyadyusha, A.
Major, H.E.
Kaczmarek, M.
Smith, P.G.R.
author_sort Snow, B.D.
title Direct optical observation of walls and disclination effects in active photonic devices
title_short Direct optical observation of walls and disclination effects in active photonic devices
title_full Direct optical observation of walls and disclination effects in active photonic devices
title_fullStr Direct optical observation of walls and disclination effects in active photonic devices
title_full_unstemmed Direct optical observation of walls and disclination effects in active photonic devices
title_sort direct optical observation of walls and disclination effects in active photonic devices
publishDate 2009
url http://eprints.um.edu.my/4674/
_version_ 1643687391272108032
score 13.211869

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