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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 NIR absorption in a Ge2Sb2Te5-based 1D asymmetric nonlinear hybrid nanostructure
Type
JournalPaper
Keywords
Nonlinear Kerr multilayers, Ge2Sb2Te5, Thermo-optical effect, Optical bistability, Kerr-NL effect, Nonreciprocal absorption
Year
2023
Journal OPTICS AND LASER TECHNOLOGY
DOI
Researchers Shiva Rashidi ، Arezou Rashidi ، Samad Roshan Entezar

Abstract

The absorption behaviors of a photonic nonlinear (NL) Kerr multilayer doped by a 30 nm-Ge2Sb2Te5 (GST) absorbing film are investigated theoretically in the near-infrared region. One can reconfigure the GST from the amorphous-to-crystalline state via the thermo-optical effect, which changes its absorption in a step-like form. Once the external light intensity increases, the resonant wavelength is red-shifted with a strong bending, yielding optical bistability due to the Kerr-NL effect. Moreover, for the input light with an appropriate non-resonant wavelength, the nonreciprocal absorption of the maximum contrast of 0.5 is realized in some ranges of intensities thanks to the localized electric field around the GST layer in only one direction. These features of the considered structure can provide a suitable platform for designing the near-infrared absorption diodes and optical switches.