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...
| Main Authors: | , , , , , , , |
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| Format: | Article |
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2009
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| _version_ | 1796945167137112064 |
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| 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. |
| collection | UM |
| 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. |
| first_indexed | 2024-03-06T05:12:37Z |
| format | Article |
| id | um.eprints-4674 |
| institution | Universiti Malaya |
| last_indexed | 2024-03-06T05:12:37Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | 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, |
| 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 |
| title | 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_short | 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 |
| topic | TK Electrical engineering. Electronics Nuclear engineering |
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