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Intrinsic and extrinsic 2D chirality in metamaterials: an easy route to asymmetric transmission

Intrinsic and extrinsic 2D chirality in metamaterials: an easy route to asymmetric transmission
Intrinsic and extrinsic 2D chirality in metamaterials: an easy route to asymmetric transmission
Intrinsic 2D chirality is a property of twisted planar objects like spirals and the letter "S", whose sense of twist is reversed for opposite directions of observation. In 2006 it was discovered that 2D chirality is associated with a fundamental electromagnetic effect, the directionally asymmetric transmission of circularly polarized waves.
Here it will be demonstrated that the intriguing phenomenon of asymmetric transmission does not require intrinsically 2D-chiral materials. Instead, extrinsic 2D chirality, which can arise from oblique incidence onto ANY structured interface, is sufficient. Being dependent on the mutual orientation of metamaterial and incident beam, the asymmetric transmission effect is inherently tunable in this case and it can even be switched off. It will be shown that the tunable transmission asymmetry is necessarily accompanied by tunable directional asymmetries in reflection and absorption, opening up an opportunity to develop novel directionally asymmetric and polarization sensitive devices. Furthermore, an overview will be given over the underlying physics and fundamental limits of the directionally asymmetric phenomena.
Plum, E.
50761a26-2982-40df-9153-7aecc4226eb5
Fedotov, V.A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Plum, E.
50761a26-2982-40df-9153-7aecc4226eb5
Fedotov, V.A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6

Plum, E., Fedotov, V.A. and Zheludev, N.I. (2010) Intrinsic and extrinsic 2D chirality in metamaterials: an easy route to asymmetric transmission. SPIE Metamaterials: Fundamentals and Applications III, United States. 01 - 05 Aug 2010.

Record type: Conference or Workshop Item (Other)

Abstract

Intrinsic 2D chirality is a property of twisted planar objects like spirals and the letter "S", whose sense of twist is reversed for opposite directions of observation. In 2006 it was discovered that 2D chirality is associated with a fundamental electromagnetic effect, the directionally asymmetric transmission of circularly polarized waves.
Here it will be demonstrated that the intriguing phenomenon of asymmetric transmission does not require intrinsically 2D-chiral materials. Instead, extrinsic 2D chirality, which can arise from oblique incidence onto ANY structured interface, is sufficient. Being dependent on the mutual orientation of metamaterial and incident beam, the asymmetric transmission effect is inherently tunable in this case and it can even be switched off. It will be shown that the tunable transmission asymmetry is necessarily accompanied by tunable directional asymmetries in reflection and absorption, opening up an opportunity to develop novel directionally asymmetric and polarization sensitive devices. Furthermore, an overview will be given over the underlying physics and fundamental limits of the directionally asymmetric phenomena.

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e-pub ahead of print date: 2010
Venue - Dates: SPIE Metamaterials: Fundamentals and Applications III, United States, 2010-08-01 - 2010-08-05
Organisations: Optoelectronics Research Centre

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Local EPrints ID: 340616
URI: https://eprints.soton.ac.uk/id/eprint/340616
PURE UUID: 690d1ac7-b69a-45c3-9ad8-b808aca9a855
ORCID for E. Plum: ORCID iD orcid.org/0000-0002-1552-1840
ORCID for N.I. Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

Catalogue record

Date deposited: 28 Jun 2012 10:08
Last modified: 05 Sep 2019 00:38

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Contributors

Author: E. Plum ORCID iD
Author: V.A. Fedotov
Author: N.I. Zheludev ORCID iD

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