Numerical study on the mechanisms of the SERS of gold-coated pyramidal tip substrates. (11th May 2016)

• Record Type: Journal Article
• Authors: Li, Rui; Wang, Qiao; Li, Hong; Liu, Kun; Pan, Shi; Zhan, Weishen; Chen, Maodu
• Is Part Of: Journal of physics. Volume 28:Number 25(2016)
• Publication Date: 2016-05-11
• Subjects: lasers -- Raman -- surface plasmons -- surface-enhanced Raman scattering; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/0953-8984/28/25/254004
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: In this paper, the physical enhancement mechanisms of the surface-enhanced Raman scattering (SERS) of pyramidal tip substrates are studied theoretically. We structure the periodic square-based arrays of adjacent nanometer pyramidal gold-coated tips on silicon. In order to determine the contribution of plasmonic or diffraction effects on the SERS, three-dimensional (3D) numerical simulations are implemented by taking into account the substrate coated with a gold thin film or a perfect electrical conductor thin film. The tip distance, metal coating thickness and incident light polarization angle are also optimized to investigate whether the further SERS signal can be enhanced.