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Temperature tunability of surface plasmon enhanced Smith-Purcell terahertz radiation for semiconductor-based grating

التفاصيل البيبلوغرافية
العنوان: Temperature tunability of surface plasmon enhanced Smith-Purcell terahertz radiation for semiconductor-based grating
المؤلفون: Bo Han Cheng, Yu-Siou Ye, Yung-Chiang Lan, Din Ping Tsai
المصدر: Scientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
بيانات النشر: Nature Portfolio, 2017.
سنة النشر: 2017
المجموعة: LCC:Medicine
LCC:Science
مصطلحات موضوعية: Medicine, Science
الوصف: Abstract In this work, the terahertz (THz) Smith-Purcell radiations (SPRs) for the relativistic electron bunch passing over an indium antimonide (InSb)-based substrate with a subwavelength grating under various temperatures of substrate are investigated by FDTD simulations and theoretical analyses. The explored SPR is locked and enhanced at a certain emission wavelength with the emission angle still following the wavelength-angle relation of the traditional SPR. This wavelength agrees with the (vacuum) wavelength of surface plasmons (SPs) at the air-InSb interface excited by the electron bunch. The enhancement of SPR at this wavelength is attributed to the energy from electron concentrated in the excited SPs and then transformed into radiation via the SPR mechanism. When the temperature of InSb increases, the emission wavelength of the enhanced SPR decreases along with the emission angles increasing gradually. This work demonstrates that the emission wavelength and angle of the enhanced SPR from the InSb grating can be manipulated by the temperature of InSb. The temperature tunability of SP-enhanced SPR has potential applications in the fields of optical beam steering and metamaterial light source.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 2045-2322
Relation: https://doaj.org/toc/2045-2322
DOI: 10.1038/s41598-017-06839-z
URL الوصول: https://doaj.org/article/d59a4d881b3d4fbc94917fc2023f6329
رقم الأكسشن: edsdoj.59a4d881b3d4fbc94917fc2023f6329
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:20452322
DOI:10.1038/s41598-017-06839-z