1. Department of Experimental Physics Institute of Physics Faculty of Science and Technology University of Debrecen Bem tér 18/a Debrecen 4026 Hungary
2. Leibniz Institute of Photonic Technology Member of Leibniz Research Alliance Health Technologies Albert‐Einstein‐Strasse 9 07745 Jena Germany
3. Institute for Chemistry and Biotechnology Department of Physical Chemistry and Microreaction Technology Technical University Ilmenau Ehrenbergstraße 29 98693 Ilmenau Germany
4. Department of Electronics Technology Faculty of Electrical Engineering and Informatics Budapest University of Technology and Economics Egry József utca 18 Budapest 1111 Hungary
5. Wigner Research Centre for Physics Konkoly‐Thege Miklós út 29‐33 Budapest 1121 Hungary