multispectral switching using fano resonance and plasmon-induced transparency in a plasmonic waveguide-coupled resonator system

Quantum interference effects, namely fano resonance producing asymmetric resonant excitation and plasmon-induced transparency (pit), are demonstrated in a plasmonic waveguide-coupled resonator device incorporated with a third-order kerr nonlinear medium. occurrence of both fano and induced transparency peaks is modulated by alteration of the nonlinear permittivity through an external control beam and the phenomenon is further utilized to investigate optical switching in the plasmonic device. simultaneous switching at multiple wavelengths is explored using fano and pit effect and the multispectral optical switching at four or more wavelengths is employed for proposed realization of trinary logic operations.