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Photonics 2015, 2(2), 745-757; doi:10.3390/photonics2020745

Fano Resonance Enhanced Nonreciprocal Absorption and Scattering of Light

1
Nonlinear Physics Centre, Australian National University, Canberra ACT 2601, Australia
2
Ioffe Physical-Technical Institute of the Russian Academy of Sciences, St. Petersburg 194021, Russia
3
ITMO University, St. Petersburg 197101, Russia
*
Author to whom correspondence should be addressed.
Received: 17 May 2015 / Revised: 18 June 2015 / Accepted: 18 June 2015 / Published: 22 June 2015
(This article belongs to the Special Issue New Frontiers in Plasmonics and Metamaterials)
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Abstract

We reveal that asymmetric plasmonic nanostructures can exhibit significantly different absorption and scattering properties for light that propagates in opposite directions, despite the conservation of total extinction. We analytically demonstrate that this is a consequence of nonorthogonality of eigenmodes of the system. This results in the necessity for modal interference with potential enhancement via Fano resonances. Based on our theory, we propose a stacked nanocross design whose optical response exhibits an abrupt change between absorption and scattering cross-sections for plane waves propagating in opposite directions. This work thereby proposes the use of Fano resonances to employ nanostructures for measuring and distinguishing optical signals coming from opposite directions. View Full-Text
Keywords: fano resonance; plasmonics; stereometamaterials; nanophotonics; reciprocity fano resonance; plasmonics; stereometamaterials; nanophotonics; reciprocity
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Hopkins, B.; Miroshnichenko, A.E.; N. Poddubny, A.; Kivshar, Y.S. Fano Resonance Enhanced Nonreciprocal Absorption and Scattering of Light. Photonics 2015, 2, 745-757.

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