Direct optical observation of walls and disclination effects in active photonic devices
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 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.
bragg gratings, liquid crystals, optics
178-184
Snow, B.D.
52b453fa-ff5c-49dd-81c9-d43eafab1ea8
Adikan, F.R.M.
69a2f4bb-520c-40a7-861d-0532cffffc40
Gates, J.C.
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Gawith, C.B.E.
926665c0-84c7-4a1d-ae19-ee6d7d14c43e
Dyadyusha, A.
2d1d75d4-60f0-4437-8771-0d0b9a3c7931
Major, Huw E.
b6df0066-f28b-498f-b606-bf3f4421fa94
Kaczmarek, M.
408ec59b-8dba-41c1-89d0-af846d1bf327
Smith, P.G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6
1 May 2009
Snow, B.D.
52b453fa-ff5c-49dd-81c9-d43eafab1ea8
Adikan, F.R.M.
69a2f4bb-520c-40a7-861d-0532cffffc40
Gates, J.C.
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Gawith, C.B.E.
926665c0-84c7-4a1d-ae19-ee6d7d14c43e
Dyadyusha, A.
2d1d75d4-60f0-4437-8771-0d0b9a3c7931
Major, Huw E.
b6df0066-f28b-498f-b606-bf3f4421fa94
Kaczmarek, M.
408ec59b-8dba-41c1-89d0-af846d1bf327
Smith, P.G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6
Snow, B.D., Adikan, F.R.M., Gates, J.C., Gawith, C.B.E., Dyadyusha, A., Major, Huw E., 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, .
(doi:10.1080/15421400902817015).
Abstract
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.
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Published date: 1 May 2009
Keywords:
bragg gratings, liquid crystals, optics
Identifiers
Local EPrints ID: 78849
URI: http://eprints.soton.ac.uk/id/eprint/78849
ISSN: 1542-1406
PURE UUID: 4036b32e-d6a1-4625-8ec6-eacf9e870541
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Date deposited: 16 Mar 2010
Last modified: 14 Mar 2024 02:45
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Contributors
Author:
B.D. Snow
Author:
F.R.M. Adikan
Author:
A. Dyadyusha
Author:
Huw E. Major
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