Broadband chirality-coded meta-aperture for photon-spin resolving

Du, L, Kou, S, Balaur, E, Cadusch, J, Roberts, A, Abbey, B, Yuan, X, Tang, D and Lin, J 2015, 'Broadband chirality-coded meta-aperture for photon-spin resolving', Nature Communications, vol. 6, 10051, pp. 1-7.


Document type: Journal Article
Collection: Journal Articles

Title Broadband chirality-coded meta-aperture for photon-spin resolving
Author(s) Du, L
Kou, S
Balaur, E
Cadusch, J
Roberts, A
Abbey, B
Yuan, X
Tang, D
Lin, J
Year 2015
Journal name Nature Communications
Volume number 6
Article Number 10051
Start page 1
End page 7
Total pages 7
Publisher Nature Publishing Group
Abstract The behaviour of light transmitted through an individual subwavelength aperture becomes counterintuitive in the presence of surrounding 'decoration', a phenomenon known as the extraordinary optical transmission. Despite being polarization-sensitive, such an individual nano-aperture, however, often cannot differentiate between the two distinct spin-states of photons because of the loss of photon information on light-aperture interaction. This creates a 'blind-spot' for the aperture with respect to the helicity of chiral light. Here we report the development of a subwavelength aperture embedded with metasurfaces dubbed a 'meta-aperture', which breaks this spin degeneracy. By exploiting the phase-shaping capabilities of metasurfaces, we are able to create specific meta-apertures in which the pair of circularly polarized light spin-states produces opposite transmission spectra over a broad spectral range. The concept incorporating metasurfaces with nano-apertures provides a venue for exploring new physics on spin-aperture interaction and potentially has a broad range of applications in spin-optoelectronics and chiral sensing.
Subject Nanophotonics
DOI - identifier 10.1038/ncomms10051
Copyright notice This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
ISSN 2041-1723
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