Title :
Optical Properties of Direct and Indirect Coupling of Cascaded Cavities in Resonator-Waveguide Systems
Author :
Jianhong Zhou ; Wenbo Han ; Ying Meng ; Hongfei Song ; Da Mu ; Wounjhang Park
Author_Institution :
Sch. of Photoelectric Eng., Changchun Univ. of Sci. & Technol., Changchun, China
Abstract :
By using the coupled-mode theory-based transfer matrix, we analyze the optical properties of direct and indirect coupling of cascaded cavities in the resonator-waveguide system. The dispersion relation of the system, bandgap opening mechanisms, and anticrossing behavior are investigated theoretically and numerically. We also derive the transmission coefficients of the direct and indirect coupling system with multiple cavities and demonstrate the interaction between the modes, which leads to Fano resonance with an asymmetric transmission line shape. All the results obtained by the transfer matrix method are confirmed by the finite-difference time-domain method in photonic crystals.
Keywords :
coupled mode analysis; dispersion relations; finite difference time-domain analysis; integrated optics; light transmission; optical couplers; optical resonators; optical waveguides; photonic crystals; Fano resonance; anticrossing behavior; asymmetric transmission line shape; bandgap opening mechanisms; cascaded cavities; coupled-mode theory-based transfer matrix; dispersion relation; finite-difference time-domain method; indirect coupling system; multiple cavities; optical properties; photonic crystals; resonator-waveguide systems; transfer matrix method; transmission coefficients; Cavity resonators; Couplings; Dispersion; Optical resonators; Optical waveguides; Photonic band gap; Resonant frequency; Optical coupling; optical waveguides; photonic integrated circuits;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2014.2346789
