INSTITUTE OF APPLIED PHYSICS - X-ray Spectroscopy and Microscopy

X-ray Spectroscopy and Microscopy

The Young Investigators Group led by Jan Rothhardt is based at the Helmholtz Institute Jena and the Institute of Applied Physics. It focuses on the development and applications of high photon flux XUV and soft x-ray sources. Such sources are enabled by high harmonic generation with high average power femtosecond fiber lasers.  .

Previous research included the demonstration of phase matching and efficient high harmonic generation at high repetition rates in the tight focusing regime, resonant enhancement of the macroscopic yield of high harmonic generation by Fano-resonances, and the demonstration of a high photon flux XUV source delivering more than 100 µW of average power per harmonic in the XUV. In addition, high photon flux soft x-rays have been generated up to the carbon absorption edge located at 283 eV. These unique table-top sources will be employed for spectroscopy and nanometer scale imaging in future.

Research areas

Dr. Rothhardt investigates matter on smallest spatial and temporal scales by using modern laser-based XUV and soft x-ray sources. His research interests include:

Teaching fields

Dr. Rothhardt's teaching activities cover Nonlinear Optics, Laser Physics and Ultrafast Laser Spectroscopy.

Research methods

Dr. Rothhardt's group utilizes a variety of modern imaging and spectroscopy techniques including:

The group utilizes modern experimental equipment including:

>> link to the x-ray spectroscopy and microscopy group