Laser induced surface enhanced Raman scattering of silver thin films decorated with carbon nanoparticles

Abstract Silver (Ag) thin films decorated with carbon nanoparticles were achieved by ablating Ag/C thin film with an Nd:YAG fiber pulsed laser under the environmental conditions. The structure and optical properties of the Ag/C samples were investigated. In this study, the Surface plasmon resonance (SPR) wavelength of Ag/C samples shift from 457 nm to 527 nm was realized using a different laser scanning rate. Compared to Ag samples, Surface enhanced Raman scattering (SERS) of Ag/C samples was also observed due to decorating with nano-carbon, which demonstrates good steadiness and high SERS intensity with the concentration of Rhodamine 6G (Rh 6G) with 10−5 mol/L. In additional, the simulation results of finite-difference-time-domain (FDTD) verify SERS performance.