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|Title:||Fano resonance in 3-D compound spirals: Chiral quality, extraordinary transmission and polarization gap|
|Authors:||Qiu, C.-W. |
coupled mode theory
electromagnetic bandgap material
|Citation:||Qiu, C.-W.,Dong, J.-W. (2011). Fano resonance in 3-D compound spirals: Chiral quality, extraordinary transmission and polarization gap. IEEE Antennas and Propagation Society, AP-S International Symposium (Digest) : 33-36. ScholarBank@NUS Repository. https://doi.org/10.1109/APS.2011.5996375|
|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 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. © 2011 IEEE.|
|Source Title:||IEEE Antennas and Propagation Society, AP-S International Symposium (Digest)|
|Appears in Collections:||Staff Publications|
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