Nanoscale transient polarization gratings
Abstract
We present the generation of transient polarization gratings at the nanoscale, achieved using a tailored accelerator configuration of the FERMI free electron laser. We demonstrate the capabilities of such a transient polarization grating by comparing its induced dynamics with the ones triggered by a more conventional intensity grating on a thin film ferrimagnetic alloy. While the signal of the intensity grating is dominated by the thermoelastic response of the system, such a contribution is suppressed in the case of the polarization grating. This exposes helicity-dependent magnetization dynamics that have so-far remained hidden under the large thermally driven response. We anticipate nanoscale transient polarization gratings to become useful for the study of any physical, chemical and biological systems possessing chiral symmetry.
Cite
@article{arxiv.2310.15734,
title = {Nanoscale transient polarization gratings},
author = {Laura Foglia and Björn Wehinger and Giovanni Perosa and Riccardo Mincigrucci and Enrico Allaria and Francesco Armillotta and Alexander Brynes and Riccardo Cucini and Dario De Angelis and Giovanni De Ninno and W. Dieter Engel and Danny Fainozzi and Luca Giannessi and Nupur N. Khatu and Simone Laterza and Ettore Paltanin and Jacopo Stefano Pelli-Cresi and Giuseppe Penco and Denny Puntel and Primož Rebernik Ribič and Filippo Sottocorona and Mauro Trovò and Clemens von Korff Schmising and Kelvin Yao and Claudio Masciovecchio and Stefano Bonetti and Filippo Bencivenga},
journal= {arXiv preprint arXiv:2310.15734},
year = {2023}
}