Diamond Materials

Diamond Materials for Quantum Application

23. September 2014: The DFG research group FOR 1493 “Diamond Materials and Quantum Applications” goes into its second funding period. FOR1493 is a national research consortium funded by the Deutsche Forsch-ungsgemeinschaft.

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ERC Advanced Grant


Graphene, nonlinear optics and photonics

Graphene, the latest member to the family of two-dimensional systems, has attracted attention far beyond the materials science and condensed-matter communities and its discovery has recently been awarded by a Nobel prize. More generally, graphene represents a conceptually new class of materials that are only one atom thick, and, on this basis, offers new inroads into low-dimensional physics that continues to surprise and astonish scientists from many disciplines. Even though commercial applications of graphene still need to find their way to the global market no further proof is needed for its importance in terms of fundamental physics. Owing to its unusual electronic spectrum, graphene has led to the emergence of a new paradigm of 'relativistic' condensed-matter physics, where quantum relativistic phenomena can now be observed and investigated in great detail. This has resulted in many intriguing experiments ranging for example from anomalous quantum Hall effect to Klein paradox and phase-coherent transport on micrometer scale.

Motivated also by the fascinating non-linear optical properties of other low-dimensional carbon allotropes like carbon nanotubes or fullerenes, graphene optics and optoelectronics are newly emerging fields with good prospects.

The research at the 3rd physics institute is directed towards non-linear optical properties of graphene by means of laser spectroscopy. In particular, phenomena like energy up- and down-conversion of short laser pulses by a laser-created electron-hole plasma in graphene are under investigation. Additionally, new approaches to structure and pattern single layer graphene beyond the optical diffraction limit are under development.