Manipulation of the resonance interaction in Mach-Zehnder-Fano interferometers
Date
2011
Authors
XU, Yi
Miroshnichenko, Andrey
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract
We study tunable interaction of the resonances in the Mach-Zehnder-Fano interferometers (MZFIs). A discrete Mach-Zehnder interferometer (MZI) with balanced arms supports bound states in the continuum. We demonstrate that doping an impurity in conventional MZIs gives rise to robust high-Q Fano resonances with asymmetric line shapes. By means of the modified Fano-Anderson model and the scattering-matrix approach, we show that the transmission and the intensity spectra of the whole system are very sensitive to both the location and the strength of the impurity. The side-coupled Fano defects induce an interaction with different eigenmodes of the pure MZI loop. We explore this interaction by tuning the parameters of the Fano defects. The observed resonance interaction can be attributed to the Fano-Feshbach resonance. We further provide with a particular physical example of photonic crystal circuit the applicability of our concept.
Description
Keywords
Keywords: Bound state; Eigen modes; Fano resonances; Line shape; Photonic crystal circuits; Resonance interaction; Scattering matrices; Whole systems; Crystal impurities; Defects; Interferometers; Photonic crystals; Resonance
Citation
Collections
Source
Physical Review A: Atomic, Molecular and Optical Physics
Type
Journal article
Book Title
Entity type
Access Statement
Open Access
License Rights
Restricted until
Downloads
File
Description