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.


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 251108


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