Fano resonance in 3-D compound spirals: Chiral quality, extraordinary transmission and polarization gap

Author

Qiu, Cheng-Wei ; Dong, Jian-Wen

Author_Institution

Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore

fYear

2011

fDate

3-8 July 2011

Firstpage

33

Lastpage

36

Abstract

A unique recipe of achieving compound spiral photonic crystals (CSPCs) in three dimensions by holography is proposed, which is composed of unit cells with double right-handed (RH) spirals of π phase shift. Interferences between side beams in the umbrella-type configurations are employed to generate CSPCs. Chirality is pronounced, and paradoxical high RH transmission peaks appear exactly in the RH polarization gap. Fano resonances, which stems from the mode interferences between left-handed propagating modes along spiral axis (direct pathway) and negative group velocity modes in the extended Brillouin zone (resonance-assisted indirect pathway), is revealed and discussed. By analyzing Fourier spectra and chirality of the photonic eigenmodes, intrinsic mechanism of such a paradox is well understood by the mode coupling theory.

Keywords

Brillouin zones; Fourier transform spectra; chirality; eigenvalues and eigenfunctions; holography; light interference; light polarisation; photonic crystals; resonance; π phase shift; 3D compound spirals; Fourier spectra; RH polarization gap; chiral quality; compound spiral photonic crystals; double right-handed spirals; extended Brillouin zone; fano resonance; holography; left-handed propagating modes; mode coupling theory; mode interferences; negative group velocity modes; paradoxical high RH transmission; photonic eigenmodes; unit cells; Antennas and propagation; Couplings; Lattices; Photonic crystals; Resonant frequency; Scattering; Spirals; Fano resonance; chiral nanophotonics; coupled mode theory; electromagnetic bandgap material; extraordinary transmission;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation (APSURSI), 2011 IEEE International Symposium on

Conference_Location

Spokane, WA

ISSN

1522-3965

Print_ISBN

978-1-4244-9562-7

Type

conf

DOI

10.1109/APS.2011.5996375

Filename

5996375