IQST Grad School Project
Light-matter interaction through the Josephson-Effect: The Josephson Junction as a Light Source
The Josephson effect is among the most versatile phenomena in solid state physics, because of its extreme sensitivity to the environmental conditions. Its most notable application is in the definition of the voltage standard allowing the volt to be measured to much higher precision than was previously possible. Even more than fifty years after its discovery, there are regimes of the Josephson effect that remain to be explored and better understood. In general terms, this concerns the interaction of light and matter by means of the Josephson effect. More specifically, we are interested in how the Josephson effect can be exploited as a microwave light source and how the generated light interacts with the tunnelling Cooper pairs in the Josephson junction.
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Selection of recent publications:
Sensing the quantum limit in scanning tunnelling spectroscopy, Christian R. Ast, Berthold Jäck, Jacob Senkpiel, Matthias Eltschka, Markus Etzkorn, Joachim Ankerhold & Klaus Kern, Nature Communications 7 13009 (2016)