Space-time meta-surfaces for light waves
Lead Research Organisation:
Imperial College London
Department Name: Physics
Abstract
In this project we propose experiments to develop the building blocks of a space-time metasurface for optical waves, based on large and ultrafast modulations of the complex refractive index of indium tin oxide (ITO). Static metasurfaces have been a milestone in how we control light waves by manipulating their phase and amplitude on the wavelength scale. Yet, they are still bounded by Lorentz reciprocity and energy conservation. A dynamical metasurface, whose optical response can be fully controlled at the speed of light through a time-varying refractive index, n(x,t), would not be just a powerful technological element, but would also bring about the rich new physics of non-Hermitian and non-time-reversible optics.
Organisations
Publications
Zotev P
(2023)
Van der Waals Materials for Applications in Nanophotonics
in Laser & Photonics Reviews
Tirole R
(2024)
Nonlinear Dielectric Epsilon Near-Zero Hybrid Nanogap Antennas
in Advanced Optical Materials
Tirole R
(2023)
Double-slit time diffraction at optical frequencies
in Nature Physics
Tirole R
(2022)
Saturable Time-Varying Mirror Based on an Epsilon-Near-Zero Material
in Physical Review Applied
Tilmann B
(2023)
Comparison of Harmonic Generation from Crystalline and Amorphous Gallium Phosphide Nanofilms
in Advanced Optical Materials
Sapienza R
(2023)
APL special topic: Time modulated metamaterials
in Applied Physics Letters
Galiffi E
(2022)
Photonics of time-varying media
in Advanced Photonics
Bruno V.
(2021)
Negative refraction in time-varying, strongly-coupled plasmonic antenna-ENZ systems
in International Conference on Metamaterials, Photonic Crystals and Plasmonics
Description | We have studied time-varying metamaterials and how their properties can be controlled by external modulation. This has led to various scientific outputs and a large consortium has been gathered now in the process to apply for further funding. |
Exploitation Route | We plan to develop new generation metamaterials, capable of controlling the frequency of the waves (optical for us but not limited to that) interacting with them. This research will benefit a broad range of researchers, from material science, to nanophotonics, to optical material engineering. |
Sectors | Aerospace, Defence and Marine,Digital/Communication/Information Technologies (including Software),Energy |
Description | We are participating in the day of light celebration, producing outreach and societal engagement. |
First Year Of Impact | 2022 |
Sector | Education |
Impact Types | Cultural |