Volume 74, Number 2, April 2006
|Page(s)||313 - 319|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||22 March 2006|
Single-molecule fluctuations in a tunnel junction: A study by scanning-tunnelling-microscopy–induced luminescence
CEA Saclay DSM DRECAM SPCSI - F-91191 Gif-sur-Yvette Cedex, France
2 CEA Saclay DRT LITEN LCC, DSEN GENEC F-91191 Gif-sur-Yvette Cedex, France
Accepted: 28 February 2006
Time-resolved measurements are essential to understand dynamic processes. The property of a tunnel junction to emit light, even in a liquid, offers an optical route to study fast phenomena occurring in this model nanoscopic system. We apply time-correlated two-photon counting to the light emitted by a STM junction immersed in a liquid. We analyze the diffusion of a single molecule at room temperature with sub-nanosecond time resolution, and its influence on the tunnelling process.
PACS: 73.20.Mf – Collective excitations (including excitons, polarons, plasmons and other charge-density excitations) / 73.40.Gk – Tunneling / 78.47.+p – Time-resolved optical spectroscopies and other ultrafast optical measurements in condensed matter
© EDP Sciences, 2006
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