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 251108

Subject Categories

Other Physics Topics

Other Electrical Engineering, Electronic Engineering, Information Engineering

Condensed Matter Physics

DOI

10.1063/5.0050797

More information

Latest update

8/24/2021