Volume 84, Number 6, December 2008
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||12 January 2009|
Optically induced angular motion of single-molecules
Laboratoire de Photonique Quantique et Moléculaire, Ecole Normale Supérieure de Cachan 61 avenue du Président Wilson, 94235 Cachan Cedex, France, EU
2 Institute of Physics, Wroclaw University of Technology - Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland, EU
Accepted: 14 November 2008
Optically induced angular motion of individual molecules exhibiting both fluorescence and photo-isomerization properties is investigated in polymer films, by means of a polarized resonant optical pump and probe scheme. The single-molecule dynamics is analyzed using a kinetic model accounting for both photo-isomerization and thermal diffusion phenomena. This study shows that the process is strongly diffusion driven and reveals the relevant time scales that can lead to a pure light-induced molecular-rotation control.
PACS: 78.67.-n – Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures / 33.80.-b – Photon interactions with molecules / 78.40.Me – Organic compounds and polymers
© EPLA, 2008
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