1403/01/10
آرزو رشیدی

آرزو رشیدی

مرتبه علمی: استادیار
ارکید: 0000-0001-5944-3226
تحصیلات: دکترای تخصصی
اسکاپوس: 57193621558
دانشکده: دانشکده علوم پایه
نشانی:
تلفن: 011-35305191

مشخصات پژوهش

عنوان
Tunable NIR absorption in a Ge2Sb2Te5-based 1D asymmetric nonlinear hybrid nanostructure
نوع پژوهش
JournalPaper
کلیدواژه‌ها
Nonlinear Kerr multilayers, Ge2Sb2Te5, Thermo-optical effect, Optical bistability, Kerr-NL effect, Nonreciprocal absorption
سال
2023
مجله OPTICS AND LASER TECHNOLOGY
شناسه DOI
پژوهشگران Shiva Rashidi ، Arezou Rashidi ، Samad Roshan Entezar

چکیده

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.