IN-PERSON EVENT - REGISTER HERE to attend
By Dr Song Jiang, Université de Strasbourg, CNRS, IPCMS, UMR 7504, F-67000 Strasbourg (France).
Abstract: The combination of scanning tunneling microscopy (STM) with optical spectroscopy has emerged as a powerful approach to investigate light–matter interactions at the single-molecule level. This capability relies on highly localized plasmonic modes confined within the STM junction, which can strongly enhance optical responses from single molecules through coupling to their vibrational and electronic excitations.
In this talk, I will present two examples of STM-based optical spectroscopy. First, I will discuss tip-enhanced Raman spectroscopy (TERS) of single molecules, focusing on how local vibrational spectroscopy can reveal molecular structure with high spatial resolution [1-3]. I will then introduce recent studies on STM-induced luminescence (STML) from single molecules and individual graphene nanoribbons[4,5], where electroluminescence provides insight into optical excitations and structure-dependent emission properties.
Short bio: Song Jiang received his PhD in Physics in 2016 from the University of Science and Technology of China (USTC), where he advanced subnanometer-resolution tip-enhanced Raman spectroscopy (TERS) under the supervision of Prof. Zhenchao Dong. He then carried out postdoctoral research at Northwestern University with Prof. Richard P. Van Duyne, focusing on electrochemical TERS (EC-TERS). He is currently a Research Engineer at IPCMS-CNRS (Strasbourg), where he works with Guillaume Schull on the development of optical scanning tunneling microscopy (STM).
Song Jiang develops advanced STM-based spectroscopies, including STM-induced electroluminescence (STML) and tip-enhanced optical techniques, to explore light–matter interactions and optoelectronic properties at the single-molecule level. His current research focuses on excitonic and charge dynamics in atomically precise nanographenes and graphene nanoribbons.
Hosted by ICREA Research Professor and Group Leader Aitor Mugarza, Atomic Manipulation and Spectroscopy group at ICN2.