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Electric-field effects in the twist-bend nematic phase

Electric-field effects in the twist-bend nematic phase
Electric-field effects in the twist-bend nematic phase

In the recently discovered Twist-Bend Nematic (NTB) phase, the nematic director is spontaneously distorted and twisted along a conical helix with an extremely short pitch, ∼10 nm. We have investigated the behavior of the NTB phase subject to an electric-field. We show that, due to the periodic NTB structure, the electro-optic effects are not nematic-like but are close analogs to those in the smectic and cholesteric phases. In particular, we have studied the fast (sub-microsecond) flexoelectrically-induced rotation of the optic axis, which is similar to the electroclinic effect in the SmA∗ phase and the flexoelectric response of short-pitch cholesterics. We discuss the possible applications of the fast NTB electro-optic effects.

chiral nematic, chiral smectic phases, electro-optic, flexoelectric effect, Nematic liquid crystal, twist-bend nematic phase
1-18
SPIE
Meyer, Claire
2e557831-5500-4cc2-a7fb-36d4c71d5f50
Dozov, Ivan
81414aa2-d72f-4a93-897b-ef0c394ab30d
Davidson, Patrick
f21cdb72-a3b9-4fcc-ba18-aa5160aa0a87
Luckhurst, Geoffrey R.
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Dokli, Irena
c24d2906-ff0e-4116-b2f0-b32b8fec1c5d
Knezevic, Anamarija
f10054d6-f6a6-4e9c-b574-3a30f4e7edf6
Lesac, Andreja
f3ae43ed-3b6c-4ca9-ae32-b1bdb71b661f
Meyer, Claire
2e557831-5500-4cc2-a7fb-36d4c71d5f50
Dozov, Ivan
81414aa2-d72f-4a93-897b-ef0c394ab30d
Davidson, Patrick
f21cdb72-a3b9-4fcc-ba18-aa5160aa0a87
Luckhurst, Geoffrey R.
3deaf900-9562-4589-ab5e-3b1fc6fce1a9
Dokli, Irena
c24d2906-ff0e-4116-b2f0-b32b8fec1c5d
Knezevic, Anamarija
f10054d6-f6a6-4e9c-b574-3a30f4e7edf6
Lesac, Andreja
f3ae43ed-3b6c-4ca9-ae32-b1bdb71b661f

Meyer, Claire, Dozov, Ivan, Davidson, Patrick, Luckhurst, Geoffrey R., Dokli, Irena, Knezevic, Anamarija and Lesac, Andreja (2018) Electric-field effects in the twist-bend nematic phase. In Emerging Liquid Crystal Technologies XIII. vol. 10555, SPIE. pp. 1-18 . (doi:10.1117/12.2301296).

Record type: Conference or Workshop Item (Paper)

Abstract

In the recently discovered Twist-Bend Nematic (NTB) phase, the nematic director is spontaneously distorted and twisted along a conical helix with an extremely short pitch, ∼10 nm. We have investigated the behavior of the NTB phase subject to an electric-field. We show that, due to the periodic NTB structure, the electro-optic effects are not nematic-like but are close analogs to those in the smectic and cholesteric phases. In particular, we have studied the fast (sub-microsecond) flexoelectrically-induced rotation of the optic axis, which is similar to the electroclinic effect in the SmA∗ phase and the flexoelectric response of short-pitch cholesterics. We discuss the possible applications of the fast NTB electro-optic effects.

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More information

Published date: 8 February 2018
Venue - Dates: 2018 Emerging Liquid Crystal Technologies XIII, San Francisco, United States, 2018-01-29 - 2018-01-31
Keywords: chiral nematic, chiral smectic phases, electro-optic, flexoelectric effect, Nematic liquid crystal, twist-bend nematic phase

Identifiers

Local EPrints ID: 420720
URI: http://eprints.soton.ac.uk/id/eprint/420720
PURE UUID: 2f3a5971-b6cb-4889-8342-033402f3991e

Catalogue record

Date deposited: 14 May 2018 16:30
Last modified: 13 Mar 2019 18:29

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Contributors

Author: Claire Meyer
Author: Ivan Dozov
Author: Patrick Davidson
Author: Geoffrey R. Luckhurst
Author: Irena Dokli
Author: Anamarija Knezevic
Author: Andreja Lesac

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