Optical Field Confining within Plasmonic-Optical Nano-antenna

Optical plasmonic bowtie nano-antenna designed to resonate at the wavelength of ۱.۵۵ micrometer is studied considering optical field coupling and concentrating within the antenna nano-gap in this paper. The plasmonic nano-antenna made of gold with the specified physical geometries is located on the surface of a silicon bulk substrate. The ۳D-FDTD simulation results demonstrate that applying the input sources with different polarizations, modifies the resulted optical field within the photonic structures; Moreover, the optical incident field of the same polarization with the bowtie nano-antenna’s arms excites the surface plasmon resonance within the interface between the antenna arms and silicon substrate and causes light localizing and improving within the nano-gap of the antenna. Confining the optical field within the sub-wavelength spaces opens the doors to a wide variety of applications such as: optical communications, data storages, optical sensors, optical lasers and sources and some others.

کلیدواژه ها:

optical coupling ، hybrid syructures ، field improvement ، optical resonance