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طراحی موجبر پلاسمونیک هیبرید گرافن متقارن با محصور شدگی و کارایی بالا | ||
| فیزیک کاربردی ایران | ||
| مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 10 خرداد 1404 | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22051/ijap.2025.48853.1435 | ||
| نویسندگان | ||
| محمدرضا جعفری* 1؛ اکبر اسدی2؛ سمیه کریمی3 | ||
| 1دانشیار، گروه فیزیک ماده چگال، دانشکده فیزیک، دانشگاه الزهرا، تهران، ایران | ||
| 2استادیار، گروه فیزیک، دانشکده علوم پایه، دانشگاه علوم دریایی امام خمینی، نوشهر، ایران | ||
| 3دانشجوی کارشناسی ارشد، گروه فیزیک ماده چگال، دانشکده فیزیک، دانشگاه الزهرا، تهران، ایران | ||
| چکیده | ||
| پلاسمون‌های موجود در گرافن دارای ویژگیهای غیرعادی هستند و چشم‌اندازهای امیدوارکنندهای را برای کاربردهای پلاسمونیکی ارائه می‌دهند. این پلاسمون‌ها محدوده بسامدی گسترده‌ای، از تراهرتز تا طیف مرئی، را پوشش می‌دهند. تاکنون مطالعات زیادی در رابطه با مُدهای پلاسمون در گرافن صورت گرفته است. در این پژوهش، یک موجبر پلاسمونیک گرافن متقارن برای بهبود عملکرد هدایت موج در محدوده فروسرخ میانی پیشنهاد و ویژگیهای پلاسمون گرافن با روش المان محدود با استفاده از نرم افزار کامسول بررسی شده است. ساختار این موجبر، به صورت دو نانو استوانه بیضوی پوشش داده شده با گرافن است که به صورت متقارن در هر طرف یک ورقه نازک قرار گرفتهاند. نتایج بدست آمده از شبیهسازی نشان میدهد که با تغییر کمیت‌های هندسی ساختار پیشنهادی و تغییر نوع مواد، طول انتشار مدها بیش از 8 میکرومتر و ناحیه مُد بهنجار شده از مرتبه بدست می‌آید. به همین دلیل، موجبرِ پیشنهادی، کاربردهای امیدوارکنندهای در اجزای مدارات مجتمع فوتونیک و سایر سامانه‌های در مقیاس نانو دارد. | ||
| کلیدواژه‌ها | ||
| موجبر پلاسمونیک؛ گرافن؛ کامسول؛ فروسرخ میانی | ||
| عنوان مقاله [English] | ||
| Design of a Symmetric Hybrid Graphene Plasmonic Waveguide with High Confinement and Efficiency | ||
| نویسندگان [English] | ||
| Mohammad Reza Jafari1؛ Akbar Asadi2؛ Somaye Karimi3 | ||
| 1Associate Professor, Department of Condensed Matter Physics, Faculty of Physics, Alzahra University, Tehran, Iran | ||
| 2Assistant Professor, Department of Physics, Faculty of Science, Imam Khomeini University of Maritime Science, Nowshahr, Iran | ||
| 3M. Sc. Student, Department of Condensed Matter Physics Faculty of Physics Alzahra University Tehran Iran | ||
| چکیده [English] | ||
| Plasmons in graphene have unusual properties and offer promising prospects for plasmonic applications covering a wide frequency range from terahertz to the visible spectrum, and many studies have been conducted on plasmon modes in graphene. In this research, a symmetric graphene plasmonic waveguide has been proposed to improve the waveguide performance in the mid-infrared range, and the plasmonic properties of graphene have been investigated by the finite element method and using COMSOL software. The structure of this waveguide is in the form of two elliptical nano-cylinders coated with graphene, which are placed symmetrically on each side of a thin sheet of Al2O3. The results obtained from the simulation show that by changing the geometric parameters of the proposed structure and changing the type of materials, the propagation length of the modes is more than 8 micrometers, and the normalized mode area is obtained in the order of 10-6. For this reason, the proposed waveguide has promising applications in photonic integrated circuit components and other nanoscale devices. | ||
| کلیدواژه‌ها [English] | ||
| Plasmonic Waveguide, Graphene, COMSOL Software, Mid-infrared | ||
| مراجع | ||
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