Nagendra Prasad Pathak
Indian Institute of Technology Roorkee, India
Title: Multiband & multifunctional photonic integrated circuits using nanoplasmonic MIM waveguides
Biography
Biography: Nagendra Prasad Pathak
Abstract
Plasmonics is a rapidly evolving subfield of nanophotonics that deals with the interaction of electromagnetic wave with surface plasmons, which are collective oscillations that occur at the interface between metal and insulator. Copper interconnects finds limitations (below 100nm regime) because of the reduced circuit size as the power dissipation per unit area is sufficient to raise the local temperature of silicon chip substrate up to the silicon’s melting point. Optical waveguides can provide an appropriate alternative, but failed due to its operation in TE or TM modes where each mode has some cut-off condition depending on the physical size of the waveguide. Due to this cut-off condition, the waveguide dimensions cannot be reduced beyond a certain limit. Further reduction in the size of optical waveguide dimensions are possible only if one can find a mode (other than higher order waveguide modes) which can exist and propagate even when the waveguide is operating under below cut-off conditions of dominant fundamental mode. Plasmonic waveguides are attractive as they support an electromagnetic mode which can carry signal through the waveguide even when operating under below cut-off conditions of dominant mode. In this talk, emphasis will be given to understand fundamental concepts in the design and analysis of multiband and multifunctional nanoplasmonic integrated circuits for the realization of concept of nanoscale wireless links. The modeling of MIM waveguide and its variants along with its applications in the design of multiband resonators, filters, couplers and diplexers will be covered in this presentation.