A Hilbert Transform method for measuring linear and nonlinear phase shifts imparted by metasurfaces
Abstract
Nonlinear metasurfaces that dynamically manipulate the phase of a passing light beam are of interest for a wide range of applications. The controlled operation of such devices requires accurate measurements of the optical transmission phase in both the linear and nonlinear regime, an experimentally challenging task. In this paper we show that this phase information can be extracted directly from simple transmission measurements, using a Hilbert transform approach, removing the need for complicated, interferometric experimental set-ups, and enabling direct measurements of the phase in conditions not suitable for other traditional approaches, such Z-scan measurements.
Citation
Wynne , L , Ballantyne , H , Li , X , Di Falco , A & Schulz , S A 2020 , ' A Hilbert Transform method for measuring linear and nonlinear phase shifts imparted by metasurfaces ' , Photonics and Nanostructures : Fundamentals and Applications , vol. In press , 100844 . https://doi.org/10.1016/j.photonics.2020.100844
Publication
Photonics and Nanostructures : Fundamentals and Applications
Status
Peer reviewed
ISSN
1569-4410Type
Journal article
Rights
Copyright © 2020 Elsevier B.V. All rights reserved. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1016/j.photonics.2020.100844.
Description
Funding: This work is funded through the DASA ”Metasurfaces for defence and security” grant ACC6004047. Laura Wynne is funded through an EPSRC DTA scholarship. Hamish Ballantyne acknowledges funding through the Royal Society Research Grant RGS\R2\180054.Collections
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