Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/136873
Title: Giant electro-optical effect through electrostriction in a nanomechanical metamaterial
Authors: Karvounis, Artemios
Gholipour, Behrad
MacDonald, Kevin F.
Zheludev, Nikolay I.
Keywords: Science::Physics::Optics and light
Issue Date: 2018
Source: Karvounis, A., Gholipour, B., MacDonald, K. F., & Zheludev, N. I. (2019). Giant electro-optical effect through electrostriction in a nanomechanical metamaterial. Advanced Materials, 31(1), 1804801-. doi:10.1002/adma.201804801
Journal: Advanced Materials
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.
URI: https://hdl.handle.net/10356/136873
ISSN: 0935-9648
DOI: 10.1002/adma.201804801
Schools: School of Physical and Mathematical Sciences 
Organisations: Centre for Disruptive Photonic Technologies
The Photonics Institute
Rights: This is the peer reviewed version of the following article: Karvounis, A., Gholipour, B., MacDonald, K. F., & Zheludev, N. I. (2019). Giant electro-optical effect through electrostriction in a nanomechanical metamaterial. Advanced Materials, 31(1), 1804801-, which has been published in final form at https://doi.org/10.1002/adma.201804801. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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