Abstract
Fano resonances, as a universal phenomenon, may in photonic structures result from the interference beween a discrete resonance and a continuum of modes. They can be realized by placing a partially transmitting element (PTE) in a waveguide that is positioned next to a cavity as in [1] where a Fano structure has been realized in a photonic crystal. The appearance of Fano resonances is well predicted by coupled-mode theory [2]. It has been shown experimentally that the parity of the transmission spectrum changes when the PTE is moved along the waveguide and that Fano structures are suitable for photonic switching due to its unique nonlinear transfer function [1]. In Figure 1a, computed transmission spectra of two PhC Fano structures (see the inset) are plotted with the only difference being the position of the PTE relative to the cavity.
© 2015 IEEE
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