نانوفیلتر موج‌بری پلاسمونی شفاف ترا هرتز از جنس MoS2 تک‌لایه شامل تشدیدگر حلقوی

نوع مقاله : علمی-پژوهشی

نویسنده

استادیار، دانشکده فنی و مهندسی، دانشگاه آیت‌الله بروجردی، بروجرد، ایران

چکیده

در این مقاله، ساختار یک نانوفیلتر موج‌بری پلاسمونی از جنس MoS2 تک‌لایه شامل یک تشدیدگر حلقوی معرفی و بررسی می‌شود. عملکرد ساختار، برای بخشی از طیف فرکانس‌های ترا هرتز است. با توجه به مقدار کم جذب و بازتاب MoS2 تک‌لایه، عبور موج و درنتیجه شفافیت قابل‌ملاحظه‌ای برای ساختار مشاهده می‌شود. پاسخ فیلتری ساختار موج‌بری ارائه شده، برخاسته از تشدیدگر است که در فرکانس‌هایی خاص تزویج نانونوارهای موج‌بری ورودی و خروجی را ممکن می‌سازد. عملکرد ساختار به کمک روش عددی تفاضل محدود در حوزه زمان شبیه‌سازی شده است. مقادیر بازده تزویج، پهنای باند در نصف بیشینه، و ضریب کیفیت، در طول‌موج کار 1255 میکرومتر، به‌ترتیب برابر با 78/0، 162 میکرومتر، و 7/7، هستند. طول‌موج کار متناظر با مُد دوم تشدید تشدیدگر است. همچنین حساسیت شاخص‌های مختلف ساختاری نسبت به تلورانس ساخت بررسی می‌شود. ساختار معرفی شده، می‌تواند کاربرد گسترده‌ای به‌عنوان الکترود شفاف در مدارهای مجتمع نوری داشته باشد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Terahertz Transparent Plasmonic Waveguide Nanofilter Based on Monolayer MoS2 Ring Resonator

نویسنده [English]

  • A. Dolatabady
Faculty of Engineering, Ayatollah Boroujerdi University, Boroujerd, Iran
چکیده [English]

In this paper, the structure of a plasmonic waveguide nanofilter based on monolayer MoS2 ring resonator is proposed and investigated. The structure performance is for a part of terahertz frequencies. Due to the low absorption and reflection of monolayer MoS2, considerable wave transmission and as a result, transparency, is provided. Filtering response caused by the proposed waveguide filter is resulted by the resonator which makes possible the coupling of the input and output nanoribbon waveguides. The structure operation has been simulated using the numerical method of finite difference time domain. The values of coupling efficiency, bandwidth at half of maximum, and quality factor, in operating wavelength of 1255 μm are respectively 0.78, 162 μm, and 7.7. The operating wavelength complies with the second resonance mode of the resonator. Also, the sensitivity of various structural indices in respect to manufacturing telorance is investigated. The proposed structure can have exnetsive application as a transparent electrode in photonic integrated circuits.

کلیدواژه‌ها [English]

  • Monolayer MoS2
  • Nanoribbon
  • Photonic Integrated Circuit
  • Plasmonic Waveguide
  • Ring Resonator
  • Waveguide Filter

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