Molecular optomechanical approach to surface-enhanced Raman scattering in plasmonic cavities

摘要

Summary form only given. Recent advances on Surface Enhanced Raman Scattering (SERS) have led to a delicate control of the coupling between extremely-confined plasmonic resonances supported by metallic structures and the vibrational states of molecules. As a consequence, experiments have started to emerge that cannot be easily explained using standard models based on the classical enhancement of the plasmonic fields near smooth metallic systems[1,2].Here, we focus on a novel theoretical framework that treats SERS as a molecular optomechanical process[3]. Contrary to typical optomechanical systems, SERS in plasmonic cavities is characterized by much larger values of losses and coupling strengths, thus opening new regimes of optomechanical interaction.