Publication

Abstract : Signal routers are one of the important element to route the information at desired network terminals. The routing of information could be more efficient when employed in optical regime. The existence of diffraction limit in photonic components becomes more vulnerable beyond the subwavelength scale, and limit their applications in high processing domain. Therefore, to overcome the limitation of photonic technology, plasmonics comes into origin with the capability of confining the charge particles (surface plasmons) to deep subwavelength scale. Among all the geometries of plasmonic waveguides, metal-insulator-metal plasmonic waveguides are more suitable to confine the surface plasmons beyond the operating wavelength. In this work, we have utilized the confining ability of MIM waveguides and cascade two different structures of Mach–Zehnder modulator. Then, two modulators are cascaded together to design the structure of signal router within the footprints of 58 µm. The analysis of signal router is done at the operating wavelength of 1550 nm with transverse magnetic (TM) polarization. The density of optical signal is controlled by optimizing the meshing to 0.029 µm in x- and z- directions with the linewidth\of 0.39 µm. The numerical analysis of structure is done by using finite-difference-time-domain (FDTD) method.