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Organic molecules observed on surfaces by optical spectrosopy

Datum
13.03.2019 
Zeit
16:30 Uhr - 17:30 Uhr 
Sprecher
Moritz Sokolowski 
Institut
Universität Bonn 
Sprache
en 
Hauptthema
Physik: Theoretische Physik
Zusammenfassung

The adsorption of large π-conjugated organic molecules on well-defined surfaces has been a topic of large interest during the last years, because the surface has significant impact on their structural ordering and their electronic excitations. Here, optical spectroscopy is a very valuable method, although it is not very commonly used in surface science, yet. We will report on two topics related to the optical transitions of molecules on surfaces that were investigated by high resolution laser spectroscopy.
The first topic, concerns the self-organization of molecules on surfaces which can lead to well-defined two-dimensional ordered molecular aggregates that are different to those known for the respective 3D-bulk materials. Thus, the intermolecular delocalization of the excitation can lead to new interesting optical phenomena present in bulk materials.
Further, we report on the detection of single molecules on surfaces by fluorescence excitation spectroscopy. As illustrated in Fig. 1 below, it is possible to separate the excitations of single molecules in the frequency range using the high resolution of laser spectroscopy. This yields insight into the interactions of the molecules with their individual local environment on the surface.

 

Letzte Aktualisierung: 13.03.2019 00:06.

Vortragsort 

Max-Planck-Institut für Physik komplexer Systeme (Room 1D1) 
Nöthnitzer Straße 38
01187 Dresden
Telefon
+ 49 (0)351 871 0 
E-Mail
Max-Planck-Institut für Physik komplexer Systeme 
Homepage
http://www.mpipks-dresden.mpg.de 

Veranstalter 

Max-Planck-Institut für Physik komplexer Systeme (MPI-PKS)
Nöthnitzer Straße 38
01187 Dresden
Telefon
+ 49 (0)351 871 0 
E-Mail
Max-Planck-Institut für Physik komplexer Systeme (MPI-PKS) 
Homepage
http://www.mpipks-dresden.mpg.de 
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