Home // ICQNM 2019, The Thirteenth International Conference on Quantum, Nano/Bio, and Micro Technologies // View article
Authors:
Badrul Alam
Andrea Veroli
Vincenzo Petruzzelli
Luca Maiolo
Lorenzo Dominici
Francesco Todisco
Milena De Giorgi
Giorgio Pettinari
Annamaria Gerardino
Alessio Benedetti
Keywords: Circular Dichroism; Metamaterials; Plasmonics; Surface Plasmons; Microfabrication
Abstract:
Research on metasurfaces featuring high circular dichroism has been very active in the last decade, because of possible applications in various fields, such as spintronics, polarization optics and stereochemistry; despite literature displaying various proposed geometries and methods, today it is hard to define an alternative choice combining high Circular Dichroism (CD), easy realization and robustness of performance. In this work we show the design approach and first experimental demonstration of a planar plasmonic metamaterial based on a comma-shaped geometry, which can be used to obtain high CD. Our metasurface combines intrinsic chirality and enhancement effects due to high field localization; in particular, the relative correspondence between numerical analyses and experiments shows the possibility to tune the effects of Surface Plasmon Resonances to a certain extent. This is equivalent to the possibility of engineering stable peak values on specific wavelength ranges, even in the presence of geometrical non-idealities due to fabrication. Samples were built through standard top-down fabrication procedures, helped by the symmetry of the extrusion. The ease in implementation, combined with reliable performances, make our proposed metamaterial eligible of adoption for further research in high precision spectroscopy and optical manipulation at industrial scale.
Pages: 23 to 26
Copyright: Copyright (c) IARIA, 2019
Publication date: October 27, 2019
Published in: conference
ISSN: 2308-3530
ISBN: 978-1-61208-749-8
Location: Nice, France
Dates: from October 27, 2019 to October 31, 2019