بررسی خصوصیات پلاسمونی موج‌بر نانونوارگرافینی قرارگرفته بر بورنیترید شش‌گوشی و زیرلایه در ناحیة فروسرخ میانی

نوع مقاله: مقاله پژوهشی کامل

نویسندگان

1 گروه فیزیک، دانشکده علوم، دانشگاه شهید چمران اهواز، اهواز، ایران

2 مرکز تحقیقات لیزر و پلاسما، دانشگاه شهید چمران اهواز، اهواز، ایران

چکیده

در این مقاله، ویژگی‌های موجبری نانونوار گرافینی قرار گرفته بر بورنیترید شش‌گوشی و یک زیرلایه بررسی شده‌اند. به‌طور مشخص، وابستگی خصوصیات مدهای پلاسمونی شامل بخش حقیقی ضریب شکست مؤثر، طول انتشار و ضریب عملکرد ساختار به بسامد، انرژی فرمی گرافین و جنس زیرلایه در ناحیة فروسرخ میانی بررسی شده است. نتایج حاصل از شبیه‌سازی‌های نشان می‌دهند که موج‌بر نانو نوارگرافینی در طول‌موج‌های فروسرخ میانی به‌شدت به تغییر بسامد و انرژی فرمی گرافین و هندسة ساختار حساس می‌باشد. همچنین طول انتشار برای انرژی فرمی (9/0) 3/0 الکترون ولت در بازۀ بسامدی 1375 تا 1600 از مقدار (4/0) 1/0 میکرومتر به مقدار (15/4) 38/0 میکرومتر می‌رسد که نشان‌دهنده افزایش حدود (10) 3 برابری است.

کلیدواژه‌ها


عنوان مقاله [English]

Investigation of plasmonic properties of graphene nanoribbon waveguide on hBN and substrate in the MID-IR spectrum range

نویسندگان [English]

  • mohammad sabaian 1 2
  • Yaser Hajati 1 2
  • Zeinab Zanbouri 1
1 1Physics Department, Faculty of Science, Shahid Chamran university of Ahvaz, Iran
2 1Physics Department, Faculty of Science, Shahid Chamran university of Ahvaz, Iran
چکیده [English]

In this study, waveguide properties of graphene nanoribbon on hBN and a substrate were investigated. Precisely, the plasmonic mode properties including real part of refractive index, propagation length, and figure-of-merit (FoM) on frequency, Fermi energy of graphene, and substrate in the mid-IR spectrum range were inspected. The simulated results show that graphene waveguide is intensively sensitive to the frequency, Fermi energy and structural geometry in the mid-IR range. Also, the propagation length for a Fermi energy of 0.3 (0.9) eV in the frequency range of 1375 cm-1 to 1600 cm-1 reachs from 0.1 (0.4) to 0.38 (4.15) µm, where shows a 3 (10) fold enhancement.

کلیدواژه‌ها [English]

  • Graphene
  • plasmonic
  • waveguide
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