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Metasurfaces and nanoantennas are redefining what can be achieved in terms of optical beam manipulation, as they provide a versatile design platform towards moulding the flow of light at will. Yet, once a conventional metasurface is designed and realised, its effect on optical beams is repeatable and stationary, thus its performance is' locked-in'at the fabrication stage. A much wider range of applications, such as dynamic beam steering, reconfigurable and dynamic lensing, optical modulation and reconfigurable spectral filtering, could be achieved if real-time tuning of metasurface optical properties were possible. Chalcogenide phase-change materials, because of their rather unique ability to undergo abrupt, repeatable and non-volatile changes in optical properties when switched between their amorphous and crystalline phases, have in recent years been combined with metasurface architectures to provide a …
IOP Publishing
Publication date: 
13 Oct 2020

C Ruiz de Galarreta, S GC Carrillo, YY Au, E Gemo, L Trimby, J Shields, E Humphreys, J Faneca, L Cai, A Baldycheva, J Bertolotti, CD Wright

Biblio References: 
Volume: 22 Issue: 11 Pages: 114001
Journal of Optics