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Arezou Rashidi

Arezou Rashidi

Academic rank: Assistant Professor
ORCID: 0000-0001-5944-3226
Education: PhD.
ScopusId: 57193621558
Faculty: Science
Address: University of Mazandaran
Phone: 011-35305191

Research

Title
Tunable terahertz absorption in Si/SiO2-graphene multilayers: disorder and magneto-optical effects
Type
JournalPaper
Keywords
disorder, perpendicular magnetic field, terahertz absorption, graphene, circular polarization selective sensors
Year
2020
Journal APPLIED OPTICS
DOI
Researchers Arezou Rashidi ، Chittaranjan Nayak ، Claudionor Bezerra ، Carlos Humberto Oliveira Costa ، Felipe Pinheiro

Abstract

In this work we theoretically investigate the influence of disorder and external perpendicular magnetic field on terahertz (THz) absorption in graphene/SiC cap layers on top of one-dimensional photonic structures. We show that left-handed circularly polarized light absorption can be achieved up to 0.9 and even nearly perfect absorption at magnetic fields over 4 T. It is also demonstrated that multichannel absorption can be obtained, in a broad frequency range, by increasing the disorder strength in the layer thicknesses, outperforming the corresponding periodic structures. Altogether, our results reveal the potentialities of introducing disorder to not only enhance but also to tune absorption in photonic superlattices with graphene under the influence of an external magnetic field, allowing for applications such as THz circular polarization selective sensors and photodetectors.