Perea-Puente, Sinuhé;
Rodríguez-Fortuño, Francisco J;
(2022)
Complex wave-vectors in lossy materials: from polarisation-loss locking to bullseye metasurface.
In: Andrews, David L and Bain, Angus J and Nunzi, Jean-Michel, (eds.)
Nanophotonics IX.
SPIE: Strasbourg, France.
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Abstract
We investigate the connection between losses of a guided mode and polarisation of the associated evanescent waves in the Poincaré sphere, demonstrating a "polarization-loss locking" in analogy to spin-momentum locking. From Fermi's golden rule, we investigate its implications for near-field directional coupling, via the introduction of a complex angular spectrum formalism. The use of complex wave-vector in the spectrum inspired us to investigate a method of achieving improved transmission of light across optically opaque materials by introducing a passive metasurface with a varying transmission phase and amplitude simultaneously.
| Type: | Proceedings paper |
|---|---|
| Title: | Complex wave-vectors in lossy materials: from polarisation-loss locking to bullseye metasurface |
| Event: | SPIE Photonics Europe, 2022 |
| Dates: | 3 Apr 2022 - 23 May 2022 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1117/12.2620560 |
| Publisher version: | https://doi.org/10.1117/12.2620560 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Polarization-loss locking, bullseye metasurface, near field coupling, angular spectrum |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10192732 |
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