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

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
1542-1406
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
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, 178-184. (doi:10.1080/15421400902817015).

Record type: Article

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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More information

Published date: 1 May 2009
Keywords: bragg gratings, liquid crystals, optics

Identifiers

Local EPrints ID: 78849
URI: https://eprints.soton.ac.uk/id/eprint/78849
ISSN: 1542-1406
PURE UUID: 4036b32e-d6a1-4625-8ec6-eacf9e870541
ORCID for J.C. Gates: ORCID iD orcid.org/0000-0001-8671-5987
ORCID for C.B.E. Gawith: ORCID iD orcid.org/0000-0002-3502-3558

Catalogue record

Date deposited: 16 Mar 2010
Last modified: 20 Jul 2019 01:08

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