کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7907574 1510756 2018 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High-efficient light absorption of monolayer graphene via cylindrical dielectric arrays and the sensing application
ترجمه فارسی عنوان
جذب نور با استفاده از گرافن یکپارچه با استفاده از آرایه های دی الکتریک استوانه ای و کاربرد حسگر
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی
The efficiency of graphene-based optoelectronic devices is typically limited by the poor absolute absorption of light. A hybrid structure of monolayer graphene with cylindrical titanium dioxide (TiO2) array and aluminum oxide (Al2O3) spacer layer on aluminum (Al) substrate has been proposed to enhance the absorption for two-dimensional (2D) materials. By combining dielectric array with metal substrate, the structure achieves multiple absorption peaks with near unity absorbance at near-infrared wavelengths due to the resonant effect of dielectric array. Completed monolayer graphene is utilized in the design without any demand of manufacture process to form the periodic patterns. Further analysis indicates that the near-field enhancement induced by surface modes gives rise to the high absorption. This favorable field enhancement and tunability of absorption not only open up new approaches to accelerate the light-graphene interaction, but also show great potential for practical applications in high-performance optoelectronic devices, such as modulators and sensors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 78, April 2018, Pages 471-476
نویسندگان
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