A Novel Design of Multilayered Bowtie Nano-Antenna for SERS Applications

Abstract

Nano-antennas are the kind of plasmonic structures that are extensively used in optical applications to achieve strong incident field enhancement. Bowtie antenna is mostly use for enhancing the incident field. The capacity to enhance the incident light, bowtie nanostructure can be upgraded by engineering the structures from several layers of metal/dielectrics by implementing Nano holes in their conventional shape. In this paper, we introduced a novel design of the bowtie structures named as “multilayered bowtie structure”. It is found that by breaking the symmetry of the multilayered structure, the resonance peaks can be controlled. Moreover, the strong and weak dipole modes are created that results in enhancing the incident field respectively which consequently make the proposed design attractive for various applications like bio-sensors, spacers, single molecules detection and most importantly SERS.