Publication

Abstract : The metal–insulator-metal (MIM) plasmonic waveguides plays an important role in confining the surface plasmons to deep subwavelength scale. In this work, S-shaped and linear MIM waveguides have been used to model the nonlinear Mach–Zehnder interferometer (MZI), that is further used to cascade the circuit of SR flip-flop. The MEH-PPV [poly(2-methoxy-5-(28-ethylhexyloxy)-PPV)] is used as nonlinear material in one of the linear arm of MZI, to introduce the Kerr effect. The Kerr effect is helpful to initiate the phenomenon of constructive and destructive interference in MZI. The occurrence of constructive and destructive interference is helpful to switch the optical signal across its output port. The analysis of proposed device is carried out at the operating wavelength of 1.55 µm with perfect matched layer (PML) as boundary condition for all the interfaces. The numerical investigation of SR flip-flop is done by using finite difference time domain (FDTD) method. The obtained results of SR flip flop are encouraging to design all other optical flip flop circuits.