Related Experiment Video
Updated: May 11, 2026

Molecular Beam Mass Spectrometry With Tunable Vacuum Ultraviolet (VUV) Synchrotron Radiation
Published on: October 30, 2012
Vibration-assisted upconversion of molecular luminescence induced by scanning tunneling microscopy
Kuniyuki Miwa1, Mamoru Sakaue, Hideaki Kasai
1Department of Applied Physics, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan. kasai@dyn.ap.eng.osaka-u.ac.jp.
Abstract:
: We investigate the effects of coupling between a molecular exciton, which consists of an electron and a hole in a molecule, and a surface plasmon (exciton-plasmon coupling) on the electron transitions of the molecule using nonequilibrium Green's function method. Due to the exciton-plasmon coupling, excitation channels of the molecule arise in the energy range lower than the electronic excitation energy of the molecule. It is found that the electron transitions via these excitation channels give rise to the molecular luminescence and the vibrational excitations at the bias voltage lower than the electronic excitation energy of the molecule. Our results also indicate that the vibrational excitations assist the emission of photons, whose energy exceeds the product of the elementary charge and the bias voltage, (upconverted luminescence).
Related Concept Videos
Overview of Microscopy Techniques
Super-resolution Fluorescence Microscopy
Scanning Electron Microscopy
Fundamental Principles
Accelerated...
Confocal Fluorescence Microscopy
Photoluminescence: Applications
Molecular Spectroscopy: Absorption and Emission

