Circular dichroism from Fano resonances in planar chiral oligomers

Ben Hopkins; Alexander N. Poddubny; Andrey E. Miroshnichenko; Yuri S. Kivshar

doi:10.1117/12.2183280

5 May 2015 Circular dichroism from Fano resonances in planar chiral oligomers

Ben Hopkins, Alexander N. Poddubny, Andrey E. Miroshnichenko, Yuri S. Kivshar

Proceedings Volume 9502, Metamaterials X; 95020Q (2015) https://doi.org/10.1117/12.2183280
Event: SPIE Optics + Optoelectronics, 2015, Prague, Czech Republic

Abstract

Here we present a general approach for describing the physics of Fano resonances in nanoparticle oligomers. It is shown that the interference of nonorthogonal collective eigenmodes is a sufficient condition to produce Fano resonances. We then show that such nonorthogonality between eigenmodes also permits the existence of a new form circular dichroism in the absorption and scattering cross-sections, even when circular dichroism is forbidden in the extinction cross-section.

Citation Download Citation

Ben Hopkins, Alexander N. Poddubny, Andrey E. Miroshnichenko, and Yuri S. Kivshar "Circular dichroism from Fano resonances in planar chiral oligomers", Proc. SPIE 9502, Metamaterials X, 95020Q (5 May 2015); https://doi.org/10.1117/12.2183280

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