کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7925938 1512510 2018 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Approaching total absorption of graphene strips using a c-Si subwavelength periodic membrane
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Approaching total absorption of graphene strips using a c-Si subwavelength periodic membrane
چکیده انگلیسی
Approaching total absorption of graphene strips at near infrared using a crystalline-silicon (c-Si) subwavelength periodic membrane (SPM) is presented. The absorption in graphene strips in a c-Si SPM is enhanced by a resonant tip, which is resulted from the coupling between the guided mode and the radiation mode through symmetry breaking of the structure at near-normal incidence. The enhancement of the electric field intensity is increased 1939 times and the group velocity of light is decreased to 3.55×10−4c at resonance, and 99.3% absorption in graphene strips can be achieved by critical coupling at the incident angle of 2°. High absorption of the graphene strips can be maintained as the etching thickness, the strip width, and the period are altered. When this type of c-Si SPM with graphene strips is used in refractive index sensors, it shows excellent sensing properties due to its stable near-unity absorption.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics Communications - Volume 413, 15 April 2018, Pages 255-260
نویسندگان
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