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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
Absorption behavior in graphene-based one-dimensional photonic crystals containing a x-cut lithium niobate layer
Type
JournalPaper
Keywords
Enhanced absorption, Graphene, Photonic crystals, Electro-optical material, Chemical potential
Year
2017
Journal SUPERLATTICES AND MICROSTRUCTURES
DOI
Researchers Arezou Rashidi ، Abdolrahman Namdar ، Reza Abdi-Ghaleh

Abstract

This paper theoretically shows that nearly perfect absorption can be achieved by adjusting the period numbers of the two graphene based photonic crystals surrounding a lithium niobate (LiNbO3) layer. Since LiNbO3 is an electro-optical (EO) material with voltage dependent refractive index and high EO coefficient, peak wavelength tunability of absorption has been revealed. Our investigations show that the relation between the peak wavelength and applied external voltage is linear, so that the peak wavelength moves toward shorter wavelengths by increasing the applied external voltage. Moreover, it is possible to achieve multi-peak by varying the thickness of LiNbO3 defect layer. Finally, we discuss the possibility of control of the absorption via controllable parameter (chemical potential) of the graphene. The results indicate that for a given structure, i.e, definite period numbers surrounding the LNO layer, the enhanced absorption can be achieved, by adjusting the chemical potential.