11 بهمن 1401
آرزو رشيدي

آرزو رشیدی

مرتبه علمی: استادیار
نشانی: دانشگاه مازندران
تحصیلات: دکترای تخصصی / فیزیک اتمی و مولکولی (فیزیک لیزر)
تلفن: 011-35302401
دانشکده: دانشکده علوم پایه

مشخصات پژوهش

عنوان Absorption behavior in graphene-based one-dimensional photonic crystals containing a x-cut lithium niobate layer
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
Enhanced absorption, Graphene, Photonic crystals, Electro-optical material, Chemical potential
مجله SUPERLATTICES AND MICROSTRUCTURES
شناسه DOI 10.1016/j.spmi.2017.03.023
پژوهشگران آرزو رشیدی (نفر اول) ، عبدالرحمن نامدار (نفر دوم) ، رضا عبدی قلعه (نفر سوم)

چکیده

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.