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DS: Fachverband Dünne Schichten

DS 31: Organic thin films I

DS 31.1: Talk

Thursday, March 29, 2012, 11:15–11:30, H 0111

(contribution withdrawn) Development of a MOKE Spectrometer with Sensitivity in the Infrared Spectral Range — •Alexander Kopylov, Michael Fronk, Dietrich R.T. Zahn, and Georgeta Salvan — Chemnitz University of Technology, 09107 Chemnitz, Germany

Magneto-optical spectroscopy can be used to assign the character and the symmetry of molecular states in molecules. This approach has been successfully applied using magnetic circular dichroism along the years. We previously showed that magneto-optical Kerr effect (MOKE) spectroscopy is a complementary tool which can be applied for paramagnetic or diamagnetic films on opaque substrates. In this work we present the development of a MOKE spectrometer for the IR to UV spectral range from 0.3 eV to 5.5 eV. This allows low energetic magneto-optical transitions to be probed as demonstrated by the example of manganese phthalocyanine, which has a gap between the lowest unoccupied molecular orbital and the highest unoccupied molecular orbital of only ~0.5 eV [1].

[1] M. Grobosch, B. Mahns, C. Loose, R. Friedrich, C. Schmidt, J. Kortus, and M. Knupfer, Chemical Physics Letters 505, 122 (2011).