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https://elib.bsu.by/handle/123456789/289969
Заглавие документа: | The Performance of Graphene‐Enhanced THz Grating: Impact of the Gold Layer Imperfectness |
Авторы: | Lamberti, Patrizia La Mura, Monica Tucci, Vincenzo Nkyalu, Erick Khan, Ali Yakovleva, Marina Valynets, Nadzeya Paddubskaya, Alesia Saushin, Aleksandr Vanyukov, Viatcheslav Baah, Marian Urbanowicz, Andrzej Svirko, Yuri Kuzhir, Polina |
Тема: | ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика |
Дата публикации: | 2022 |
Издатель: | MDPI |
Библиографическое описание источника: | Mater 2022;15(3). |
Аннотация: | We report the performance of a graphene‐enhanced THz grating fabricated by depositing a gold layer on the femtosecond micromachined SiO2 substrate. The morphology of the gold plated patterned substrate was studied by scanning electron microscopy (SEM) and atomic force microscopy (AFM), while the quality of the chemical vapor deposition (CVD) graphene was evaluated by Raman spectroscopy. The electromagnetic (EM) response of the metasurface comprising the gra-phene sheet and the gold plated substrate was studied by THz time domain spectroscopy in the 100 GHz–1 THz frequency range. We employed the finite elements method (FEM) to model the metasurface EM response by adjusting the ac conductivity of the gold layer covering the patterned SiO2 substrate to reproduce the measured transmission/reflection spectra. The results of the numer-ical simulation reveal the impact of the imperfectness of the gold layer on the performance of the THz metasurface. The experimental results are well described in terms of the Drude–Smith model of metal conductivity that takes into account the anisotropic scattering of the carriers in thin metal films. |
URI документа: | https://elib.bsu.by/handle/123456789/289969 |
DOI документа: | 10.3390/ma15030786 |
Scopus идентификатор документа: | 85123062531 |
Финансовая поддержка: | Funding: This work was financially supported by the Academy of Finland Flagship Programme, Photonics Research and Innovation (PREIN), decision 320166, Horizon 2020 RISE DiSeTCom Project 823728 and BRFFR project F19INDG‐006. P.K. is supported by Horizon 2020 IF TURANDOT project 836816. M.L.M. is supported by Horizon 2020 GrapheneCore3 project 881603. |
Лицензия: | info:eu-repo/semantics/openAccess |
Располагается в коллекциях: | Статьи НИУ «Институт ядерных проблем» |
Полный текст документа:
Файл | Описание | Размер | Формат | |
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materials-15-00786-v2.pdf | 3,76 MB | Adobe PDF | Открыть |
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