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AC-field–enhanced beam coupling in photorefractive, hybrid liquid crystals

AC-field–enhanced beam coupling in photorefractive, hybrid liquid crystals
AC-field–enhanced beam coupling in photorefractive, hybrid liquid crystals
The use of photorefractive layers in liquid crystal cells to achieve beam coupling typically requires an applied DC field to achieve high gain. In hybrid cells, with PVK:C60 polymer sandwiched with nematic liquid crystals, this limitation can be lifted by using a low-frequency AC field. AC fields with frequencies between 1 and 10 Hz lead to gain values that are larger than those at equivalent DC fields. The optical response of the hybrid liquid crystal system to the AC field can be understood using a simple impedance ladder model.
0295-5075
14003-[6pp]
Herrington, M.
0ffd43b6-fa1b-49e3-add1-0845d4f5da39
Daly, K.
f40a9985-ef81-4d7e-a7ea-defa8cf8a533
Buchnev, O.
60cdb0d2-3388-47be-a066-61b3b396f69d
D'Alessandro, G.
bad097e1-9506-4b6e-aa56-3e67a526e83b
Kaczmarek, M.
408ec59b-8dba-41c1-89d0-af846d1bf327
Herrington, M.
0ffd43b6-fa1b-49e3-add1-0845d4f5da39
Daly, K.
f40a9985-ef81-4d7e-a7ea-defa8cf8a533
Buchnev, O.
60cdb0d2-3388-47be-a066-61b3b396f69d
D'Alessandro, G.
bad097e1-9506-4b6e-aa56-3e67a526e83b
Kaczmarek, M.
408ec59b-8dba-41c1-89d0-af846d1bf327

Herrington, M., Daly, K., Buchnev, O., D'Alessandro, G. and Kaczmarek, M. (2011) AC-field–enhanced beam coupling in photorefractive, hybrid liquid crystals. Europhysics Letters, 95 (1), 14003-[6pp]. (doi:10.1209/0295-5075/95/14003).

Record type: Article

Abstract

The use of photorefractive layers in liquid crystal cells to achieve beam coupling typically requires an applied DC field to achieve high gain. In hybrid cells, with PVK:C60 polymer sandwiched with nematic liquid crystals, this limitation can be lifted by using a low-frequency AC field. AC fields with frequencies between 1 and 10 Hz lead to gain values that are larger than those at equivalent DC fields. The optical response of the hybrid liquid crystal system to the AC field can be understood using a simple impedance ladder model.

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Published date: July 2011

Identifiers

Local EPrints ID: 193233
URI: https://eprints.soton.ac.uk/id/eprint/193233
ISSN: 0295-5075
PURE UUID: 4a6f8d68-13a2-4bb9-a9e2-0dc623c296bd
ORCID for G. D'Alessandro: ORCID iD orcid.org/0000-0001-9166-9356

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Date deposited: 13 Jul 2011 07:30
Last modified: 06 Jun 2018 13:05

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