Optical vortices at Fano resonances

We study the transmission properties of a one-dimensional array with intersite side-coupled defect and demonstrate that, as the system undergoes sharp Fano resonance, it exhibits geometry-induced vorticity of the energy flux. The optical vortex inverts its handedness at the Fano resonance, revealing...

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Bibliographic Details
Published in:Optics letters 2012-12, Vol.37 (23), p.4985-4987
Main Authors: Xu, Yi, Miroshnichenko, Andrey E, Desyatnikov, Anton S
Format: Article
Language:English
Subjects:
Arrays
Crystal defects
Fluid flow
Flux
Handedness
Origins
Photonic crystals
Vortices
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Summary:We study the transmission properties of a one-dimensional array with intersite side-coupled defect and demonstrate that, as the system undergoes sharp Fano resonance, it exhibits geometry-induced vorticity of the energy flux. The optical vortex inverts its handedness at the Fano resonance, revealing a strong link between two phenomena, both being of interference origin. Our approach is quite general and can be applied to a variety of systems; as an example we demonstrate a similar effect in photonic crystal structure.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.37.004985