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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
Kerr-nonlinearity-assisted NIR nonreciprocal absorption in a VO2-based core–shell composite integrated with 1D nonlinear multilayers
Type
JournalPaper
Keywords
nonreciprocal optical response; nonlinear Kerr-dielectrics; VO2 nanoinclusions; near-infrared; bistable absorption; absorptive diodes
Year
2021
Journal APPLIED OPTICS
DOI
Researchers Shiva Rashidi ، Samad Roshan Entezar ، Arezou Rashidi

Abstract

We theoretically investigate the nonreciprocal optical response of a one-dimensional multilayer possessing nonlinear (NL) Kerr dielectrics hybridized with a VO2-based core–shell structure. As a consequence of parameter optimization, it is found that semiconductor-to-metallic reconfiguring of relatively thin VO2 nanoinclusions with a core–shell radius ratio of 0.95 is accompanied by enhanced multispectral near-infrared absorption of the system for both forward and backward incidences of light.However, increasing intensity of the incident wave bends the resonant wavelengths due to the NL response of Kerr dielectrics. When the incident light is well set up for an appropriate non-resonant wavelength, the absorption contrast between two directions of incidence enhances in some ranges of intensities due to the NL Kerr effect. There is also the possibility of reaching S-shaped bistable absorption. These features make the modeled system suitable for designing near-infrared absorptive diodes or isolators.