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Colloquium
STM-induced light emission: from molecular LED to hyper-resolved fluorescence microscopy
Feb. 21, 2018, 16:30 - 18:00
KIT, Campus Nord
Institute of Nanotechnology
Bldg. 640 Seminar room 0-167
Hermann-von-Helmholtz-Platz 1
76344 Eggenstein-Leopoldshafen
 

Talk given by

Dr. Guillaume Schull
IPCMS
University of Strasbourg
Strasbourg, France

 

Abstract:

The electric current traversing the junction of a scanning tunneling microscope (STM) may generate a local emission of light. During the last years, we have used this method to study the intrinsic luminescence properties of individual molecules. This work has progressed in two directions. On one side we have used the ability of the STM to manipulate matter with atomic-scale precision to form single-molecule light emitting devices [1]. Composed by individual molecular wires suspended between the tip and the sample of the STM (see figure), these devices generate an emission of light whose color, intensity and bandwidth can be controlled with high precision [2,3]. On the other side, we used the intrinsic resolution of the STM to performed sub-molecularly resolved vibronic spectroscopy of molecules separated from a metallic surfaces by a thin insulating layers [4]. These results constitute an important step towards photonic measurements with atoms-scale resolution.

 

Figure: Artistic view of a single-molecule optoelectronic device operated with a scanning tunnelling microscope

 

[1] G. Reecht et al., Phys. Rev. Lett. 112, 047403 (2014)

[2] M.C. Chong et al., Phys. Rev. Lett. 116, 036802 (2016)

[3] M.C. Chong et al., Nanoletters 16, 6480 (2016)

[4] B. Doppagne et al., Phys. Rev. Lett. 118, 127401 (2017)

 

 
This event is part of the eventgroup INT Talks
Homepage
http://www.int.kit.edu/events.php
Speaker
Dr. Guillaume Schull

IPCMS, University of Strasbourg
STM group
Organizer
Prof. Ralph Krupke
Institut für Nanotechnologie
KIT
Mail:ralph krupkeDad2∂kit edu
http://www.int.kit.edu
Targetgroup
Interested / Everyone
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