Heidelberg 2015 – scientific programme
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A: Fachverband Atomphysik
A 38: Interaction with VUV and X-ray light II
A 38.4: Talk
Friday, March 27, 2015, 12:00–12:15, C/HSW
Polaritons in a nuclear optical lattice — •Johann Haber1, Kai Schlage1, Kai Sven Schulze2,3, Tatyana Guryeva1, Robert Lötzsch2,3, Lars Bocklage1, Daniel Schumacher1, Hans-Christian Wille1, Ingo Uschmann2,3, Rudolf Rüffer4, and Ralf Röhlsberger1 — 1Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany — 2Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena, Germany — 3Helmholtz-Institut Jena, Fröbelstieg 3, 07743 Jena, Germany — 4European Synchrotron Radiation Facility, B.P. 220, 38043 Grenoble Cedex, France
We fabricate a nuclear optical lattice by sputtering alternating layers of nuclear resonant 57Fe and non-resonant 56Fe. The multilayer has no variation in the background refractive index, but the polaritonic interaction of x-ray radiation and the 57Fe- nuclei leads to a variation of the index of refraction at the 14.41 keV resonance of 57Fe. We perform reflectivity measurements and Mössbauer spectroscopy of the multilayer around the Bragg angle and explain our results in terms of the dispersion relation of the system which we derive by a transfer matrix algorithm as well as a simple quantum optical model.