Spontaneous natural optical activity in disordered media
Spontaneous natural optical activity in disordered media
We theoretically demonstrate natural optical activity in disordered ensembles of nonchiral plasmonic resonators. We show that the statistical distributions of rotatory power and spatial dichroism are strongly dependent on the scattering mean free path in diffusive random media. This result is explained in terms of the intrinsic geometric chirality of disordered media, as they lack mirror symmetry. We argue that chirality and natural optical activity of disordered systems can be quantified by the standard deviation of both rotatory power and spatial dichroism. Our results are based on microscopic electromagnetic wave transport theory coupled to vectorial Green's matrix method for pointlike scatterers and are independently confirmed by full-wave simulations.
Pinheiro, F.A.
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Fedotov, V.A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Papasimakis, N.
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Pinheiro, F.A.
2fb71c2c-1408-45d8-b166-41f0f336891d
Fedotov, V.A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Papasimakis, N.
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Pinheiro, F.A., Fedotov, V.A., Papasimakis, N. and Zheludev, N.I.
(2017)
Spontaneous natural optical activity in disordered media.
Physical Review B, 95 (22), [220201].
(doi:10.1103/PhysRevB.95.220201).
Abstract
We theoretically demonstrate natural optical activity in disordered ensembles of nonchiral plasmonic resonators. We show that the statistical distributions of rotatory power and spatial dichroism are strongly dependent on the scattering mean free path in diffusive random media. This result is explained in terms of the intrinsic geometric chirality of disordered media, as they lack mirror symmetry. We argue that chirality and natural optical activity of disordered systems can be quantified by the standard deviation of both rotatory power and spatial dichroism. Our results are based on microscopic electromagnetic wave transport theory coupled to vectorial Green's matrix method for pointlike scatterers and are independently confirmed by full-wave simulations.
Text
LX15363_PRB
- Accepted Manuscript
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Accepted/In Press date: 5 June 2017
e-pub ahead of print date: 20 June 2017
Organisations:
Optoelectronics Research Centre
Identifiers
Local EPrints ID: 411990
URI: http://eprints.soton.ac.uk/id/eprint/411990
ISSN: 1550-235X
PURE UUID: fc645dd1-8afd-42f5-9144-84c5c6e6259b
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Date deposited: 04 Jul 2017 16:31
Last modified: 16 Mar 2024 03:55
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Contributors
Author:
F.A. Pinheiro
Author:
V.A. Fedotov
Author:
N. Papasimakis
Author:
N.I. Zheludev
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