Non-contact optical magnetic field sensor based on metamaterial nanomechanics

Lan, Guoqiang, Ou, Jun-Yu, Papas, Dimitrios, Zheludev, Nikolai and Plum, Eric (2022) Non-contact optical magnetic field sensor based on metamaterial nanomechanics. APL Photonics, 7 (3), [036101]. (doi:10.1063/5.0081849).

Record type: Article

Abstract

We demonstrate a non-contact optical magnetic field sensor that is based on actuation of a metamaterial-microcavity by the magnetic Lorentz force. Magnetic field is transduced to a change of the sensor's reflectivity. The microscale proof-of-concept metamaterial magnetometer can be read from a distance and offers 60 μm spatial, about 10 μs temporal, and sub-microtesla magnetic field resolution.

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Non-contact optical magnetic field sensor based on metamaterial nanomechanics - accepted manuscript - Accepted Manuscript

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Accepted/In Press date: 7 February 2022

Published date: 1 March 2022

Additional Information: Funding Information: This work was supported by the Office of Naval Research (Grant No. N62909-18-1-2026), the UK’s Engineering and Physical Sciences Research Council (Grant Nos. EP/M009122/1 and EP/T02643X/1), the Singapore Ministry of Education [Grant No. MOE2016-T3-1-006 (S)], and the Basic Scientific Research of Heilongjiang University (Grant No. 2020-KYYWF-0997). Publisher Copyright: © 2022 Author(s).

Keywords: Lorentz force, magnetic field, magnetometer, metamaterial, nanomechanics, sensing

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