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19 April 2024

» arxiv » 1412.1120

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Circular dichroism induced by Fano resonances in planar chiral oligomers
Ben Hopkins ; Alexander N. Poddubny ; Andrey E. Miroshnichenko ; Yuri S. Kivshar ;
Date:	2 Dec 2014
Abstract:	We present a general theory of circular dichroism induced in planar chiral nanostructures with rotational symmetry. It is demonstrated, analytically, that the handedness of the incident field’s polarization can control whether a nanostructure induces either absorption or scattering losses, even when the total loss (extinction) is polarization-independent. We then show that this effect is a consequence of modal interference so that strong circular dichroism in absorption and scattering can be engineered by combining Fano resonances with chiral nanoparticle clusters.
Source:	arXiv, 1412.1120
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