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 terahertz absorption in Si/SiO2-graphene multilayers: disorder and magneto-optical effects
نوع پژوهش
JournalPaper
کلیدواژه‌ها
disorder, perpendicular magnetic field, terahertz absorption, graphene, circular polarization selective sensors
سال
2020
مجله APPLIED OPTICS
شناسه DOI
پژوهشگران Arezou Rashidi ، Chittaranjan Nayak ، Claudionor Bezerra ، Carlos Humberto Oliveira Costa ، Felipe Pinheiro

چکیده

In this work we theoretically investigate the influence of disorder and external perpendicular magnetic field on terahertz (THz) absorption in graphene/SiC cap layers on top of one-dimensional photonic structures. We show that left-handed circularly polarized light absorption can be achieved up to 0.9 and even nearly perfect absorption at magnetic fields over 4 T. It is also demonstrated that multichannel absorption can be obtained, in a broad frequency range, by increasing the disorder strength in the layer thicknesses, outperforming the corresponding periodic structures. Altogether, our results reveal the potentialities of introducing disorder to not only enhance but also to tune absorption in photonic superlattices with graphene under the influence of an external magnetic field, allowing for applications such as THz circular polarization selective sensors and photodetectors.