Macroscopic magneto-chiroptical metasurfaces
Journal article, 2021
Nanophotonic chiral antennas exhibit orders of magnitude higher circular dichroism (CD) compared to molecular systems. When the structural chirality is merged with magnetism at the nanoscale, efficient magnetic control over the dichroic response is achieved, bringing exciting prospects to active nanophotonic devices. Here, we devise macroscopic enantiomeric magnetophotonic metasurfaces of plasmonic-ferromagnetic spiral antennas assembled on large areas via hole-mask colloidal lithography. The simultaneous presence of 3D- and 2D-features in chiral nanoantennas induces large CD response, where we identify reciprocal and non-reciprocal contributions, respectively. Exploring further this type of magnetophotonic metasurfaces might allow the realization of high-sensitivity chiral sensors and prompts the design of advanced macroscopic optical devices operating with polarized light.
Author
Gaia Petrucci
University of Pisa
Alessio Gabbani
University of Florence
University of Pisa
Ihar Faniayeu
University of Gothenburg
Esteban Pedrueza Villalmanzo
University of Gothenburg
Chalmers, Chemistry and Chemical Engineering, Chemistry and Biochemistry
Giuseppe Cucinotta
University of Florence
Matteo Atzori
Grenoble Alpes University
Alexandre Dmitriev
University of Gothenburg
Francesco Pineider
University of Pisa
Applied Physics Letters
0003-6951 (ISSN) 1077-3118 (eISSN)
Vol. 118 25 251108Subject Categories
Other Physics Topics
Other Electrical Engineering, Electronic Engineering, Information Engineering
Condensed Matter Physics
DOI
10.1063/5.0050797