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Giant electro-optical effect through electrostriction in a nano-mechanical metamaterial

Giant electro-optical effect through electrostriction in a nano-mechanical metamaterial
Giant electro-optical effect through electrostriction in a nano-mechanical metamaterial
Electrostriction is a property of all naturally occurring dielectrics whereby they are mechanically deformed under the application of an electric field. It is demonstrated here that an artificial metamaterial nanostructure comprising arrays of dielectric nanowires, made of silicon and indium tin oxide, is reversibly structurally deformed under the application of an electric field, and that this reconfiguration is accompanied by substantial changes in optical transmission and reflection, thus providing a strong electro‐optic effect. Such metamaterials can be used as the functional elements of electro‐optic modulators in the visible to near‐infrared part of the spectrum. A modulator operating at 1550 nm with effective electrostriction and electro‐optic coefficients of order 10−13 m2 V−2 and 10−6 m V−1, respectively, is demonstrated. Transmission changes of up to 3.5% are obtained with a 500 mV control signal at a modulation frequency of ≈6.5 MHz. With a resonant optical response that can be spectrally tuned by design, modulators based on the artificial electrostrictive effect may be used for laser Q‐switching and mode‐locking among other applications that require modulation at megahertz frequencies.
1521-4095
Karvounis, Artemios
878c12bb-c30e-46f4-8c56-86423b41cdba
Gholipour, Behrad
c17bd62d-9df6-40e6-bc42-65272d97e559
MacDonald, Kevin F.
76c84116-aad1-4973-b917-7ca63935dba5
Zheludev, Nikolay I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Karvounis, Artemios
878c12bb-c30e-46f4-8c56-86423b41cdba
Gholipour, Behrad
c17bd62d-9df6-40e6-bc42-65272d97e559
MacDonald, Kevin F.
76c84116-aad1-4973-b917-7ca63935dba5
Zheludev, Nikolay I.
32fb6af7-97e4-4d11-bca6-805745e40cc6

Karvounis, Artemios, Gholipour, Behrad, MacDonald, Kevin F. and Zheludev, Nikolay I. (2019) Giant electro-optical effect through electrostriction in a nano-mechanical metamaterial. Advanced Materials, 31 (1). (doi:10.1002/adma.201804801).

Record type: Article

Abstract

Electrostriction is a property of all naturally occurring dielectrics whereby they are mechanically deformed under the application of an electric field. It is demonstrated here that an artificial metamaterial nanostructure comprising arrays of dielectric nanowires, made of silicon and indium tin oxide, is reversibly structurally deformed under the application of an electric field, and that this reconfiguration is accompanied by substantial changes in optical transmission and reflection, thus providing a strong electro‐optic effect. Such metamaterials can be used as the functional elements of electro‐optic modulators in the visible to near‐infrared part of the spectrum. A modulator operating at 1550 nm with effective electrostriction and electro‐optic coefficients of order 10−13 m2 V−2 and 10−6 m V−1, respectively, is demonstrated. Transmission changes of up to 3.5% are obtained with a 500 mV control signal at a modulation frequency of ≈6.5 MHz. With a resonant optical response that can be spectrally tuned by design, modulators based on the artificial electrostrictive effect may be used for laser Q‐switching and mode‐locking among other applications that require modulation at megahertz frequencies.

Text
adma 201804801R1 accepted manuscript - Accepted Manuscript
Restricted to Repository staff only until 5 November 2019.
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More information

Accepted/In Press date: 9 October 2018
e-pub ahead of print date: 6 November 2018
Published date: 4 January 2019

Identifiers

Local EPrints ID: 425088
URI: https://eprints.soton.ac.uk/id/eprint/425088
ISSN: 1521-4095
PURE UUID: b0228da8-e6ea-4ebb-bcbd-460cd6e00645
ORCID for Kevin F. MacDonald: ORCID iD orcid.org/0000-0002-3877-2976
ORCID for Nikolay I. Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

Catalogue record

Date deposited: 10 Oct 2018 16:30
Last modified: 14 Mar 2019 01:53

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