Department of physics, Tarbiat Modares University, Tehran, P.O Box 14115-175, Iran
Department of physics, Tarbiat Modares University, Tehran, P.O Box 14115-175
Department of physics, Sharif University of Technology, Tehran, P.O Box 14588-89694, Iran
We propose an innovative design for metallic slit-groove nanostructure to increase the propagation intensity of a unidirectional surface plasmon polariton (SPP) light beam. Our idea is based on the combination of the concept of unidirectional plasmonic wave propagation in a metallic slit-groove nanostructure and the well- known hybrid modes of a hybrid metal-dielectric waveguide. Our results demonstrate that the hybrid structure results in up to 5 times enhancement in the SPP beam intensity relative to the conventional design of slit-groove nanostructure. This new design of SPP based nano source can be applied in many applications including nano photonic devices.