[7p-N203-1~14] 4.1 Plasmonics and Nanophotonics

1:30 PM - 2:00 PM JST(4:30 AM - 5:00 AM UTC)English Presentation

[7p-N203-1] [JSAP-Optica Joint Symposia Invited Talk] Metal-Based vs. Metal-Free SERS Substrates

〇Yasutaka Kitahama^1,2, Keisuke Goda^1,2,3,4,5 (1.Univ. of Tokyo, 2.LucasLand, 3.Wuhan Univ., 4.Univ. of California, 5.Tohoku Univ.)

Keywords:

Surface-enhance Raman spectroscopy,Electromagnetic mechanism,Chemical mechanism

Surface-enhanced Raman spectroscopy (SERS) represents a powerful extension of conventional Raman spectroscopy, a label-free analytical technique renowned for its ability to resolve sharp vibrational signatures of analyte molecules. Two predominant mechanisms are widely acknowledged to underpin SERS: the electromagnetic (EM) and chemical mechanisms. In this study, we present a comparative evaluation of metal-based and metal-free SERS substrates. We have developed a novel metal nanomesh substrate, which operates on the EM mechanism, as well as metal-free SERS substrates that harness the chemical mechanism. These substrates are assessed in terms of sensitivity, uniformity, and additional performance metrics.