Macroscopic magneto-chiroptical metasurfaces
Artikel i vetenskaplig tidskrift, 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.
Författare
Gaia Petrucci
Universita di Pisa
Alessio Gabbani
Universita degli Studi di Firenze
Universita di Pisa
Ihar Faniayeu
Göteborgs universitet
Esteban Pedrueza Villalmanzo
Göteborgs universitet
Chalmers, Kemi och kemiteknik, Kemi och biokemi
Giuseppe Cucinotta
Universita degli Studi di Firenze
Matteo Atzori
Université Grenoble Alpes
Alexandre Dmitriev
Göteborgs universitet
Francesco Pineider
Universita di Pisa
Applied Physics Letters
0003-6951 (ISSN) 1077-3118 (eISSN)
Vol. 118 25 251108Ämneskategorier
Annan fysik
Annan elektroteknik och elektronik
Den kondenserade materiens fysik
DOI
10.1063/5.0050797