A Hilbert Transform method for measuring linear and nonlinear phase shifts imparted by metasurfaces

Laura Wynne, Hamish Ballantyne, Xin Li, Andrea Di Falco, Sebastian Andreas Schulz*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)
4 Downloads (Pure)

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.
Original languageEnglish
Article number100844
JournalPhotonics and Nanostructures : Fundamentals and Applications
VolumeIn press
Early online date1 Oct 2020
DOIs
Publication statusE-pub ahead of print - 1 Oct 2020

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