סמינר LMI -מרכז אור וחומר מארח את Dr. Tomas Neuman
LMI Seminar:
Atomically resolved optical spectroscopy using a scanning-tunneling microscope
Dr. Tomas Neuman
Group Head, Light and Matter Theory, Czech Academy of Sciences Prague,
Czech Republic
Wednesday May 3th, 2023
13:00-14:00
Light refreshments and drinks will be served at 12:30
Auditorium 011, Engineering Classroom Building, Faculty of Engineering, Tel-Aviv University
Abstract: I will talk about an intriguing method of microscopy that combines the atomic-scale resolution of a scanning-tunneling microscope (STM) with optics. This method is taking advantage of phenomena including the optical Stark shift and plasmonic Purcell effect to reveal excited-state properties of nanoscale samples with unprecedented spatial resolution.
In particular, I will talk about the mechanism of STM-induced luminescence applied to dye molecules and show how this technique allows one to obtain spectroscopic information and optical imaging of nanoscale samples with almost atomic-scale precision. Finally, I will show some latest results that include the nanoscale optical detection of molecular tautomerization, or detection of localized excitons in graphene nanoribbons.
