SERS effect of rhombic Au film structure fabricated by NPF method

Abstract

This study aims to develop a SERS (surface enhanced RAMAN scattering) substrate by using the electric field enhancement effect generated by rhombic structures of thin Au film. First, the electric field distribution near the rhombic structure of a thin Au film induced by an incident laser beam was simulated by FEM of COMSOL Multiphysics. Then, rhombic structures of a thin Au film were fabricated by using the Nano Plastic Forming method, and the effects of geometry of the rhombic structure on the enhancement factor EF was studied. It was verified that the Raman enhancement factor EF can be improved by adjusting geometry of the rhombic Au film structure.