(Invited) Plasmonic Patch Nanoantennas for Reproducible and High-Sensitivity Chemical Detection with Surface-Enhanced Raman Spectroscopy. (21st March 2018)

• Record Type: Journal Article
• Authors: Wang, Feng; Joshi, Bhuwan P; Chakrabarty, Ayan; Zhang, Hailiang; Wei, Qi-Huo
• Is Part Of: ECS transactions. Volume 85:Number 9(2018)
• Page Start: 77
• Page End: 85
• Publication Date: 2018-03-21
• Subjects: Electrochemistry -- Periodicals; Electrochemistry; Periodicals; Electronic journals; Electronic journal; 541.37
• DOI: 10.1149/08509.0077ecst
• Languages: English
• ISSNs: 1938-5862

Abstract

Abstract : Surface enhanced Raman scattering, referring to enhanced Raman signals of molecules by plasmonic nanostructures, has been employed as a unique label-free detection scheme for various biological and chemical molecules. Here we present plasmonic patch nanoantennas as a platform for SERS applications. The patch antennas are made of metallic patches on the top of a metal film separated by a dielectric layer. This vertical metal-dielectric-metal design makes it possible to control the gap size in nanometers reproducibly by using thin film deposition techniques such as atomic layer deposition. We report numerical and experimental results on resonant cavity modes and measurements of the SERS enhancement factors for these plasmonic patch antennas.