Nanowerk  July 31, 2023 Surface enhanced Raman scattering (SERS) is becoming a highly topical technique for identifying and fingerprinting molecules. Crucial for SERS is the need for substrates with strong and reproducible enhancements of the Raman signal over large areas and with a low fabrication cost. An international team of researchers (UK, Germany, the Netherlands, Belgium) found that dense arrays of plasmonic nanohelices have excellent SERS properties. As an illustration, they presented two new ways to probe near-field enhancement generated with circular polarization at chiral metasurfaces, first using the Raman spectra of achiral molecules (crystal violet) and second using a […]