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Ultra-broadband THz absorbers based on 3D graphene
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SYSNO ASEP 0576637 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Ultra-broadband THz absorbers based on 3D graphene Author(s) Kumar, Prabhat (FZU-D) ORCID
Šilhavík, Martin (FZU-D) ORCID
Červenka, Jiří (FZU-D) RID, ORCID
Kužel, Petr (FZU-D) RID, ORCID, SAINumber of authors 4 Article number 505103 Source Title Journal of Physics D-Applied Physics. - : Institute of Physics Publishing - ISSN 0022-3727
Roč. 56, č. 50 (2023)Number of pages 8 s. Language eng - English Country US - United States Keywords absorbers ; terahertz ; 3D graphene Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects EF16_019/0000760 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GX19-28375X GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support FZU-D - RVO:68378271 UT WOS 001074455100001 EID SCOPUS 85174807641 DOI 10.1088/1361-6463/acfb1c Annotation We use terahertz and multi-terahertz spectroscopy to investigate optical properties of three-dimensional (3D) graphene across a wide frequency range of 0.15–10 THz. We explore the electromagnetic shielding, stealth, and absorber capabilities of 3D graphene samples annealed at various temperatures up to 1300°C. We show that the tradeoff between the transmitted, absorbed and reflected power of the materials can be controlled by the annealing temperature through a fine broadband tuning of the refractive and absorptive indices of the material. Depending on the annealing conditions, this ultralight system is capable of acting as a stealth element, THz absorber or a shielding coating within an ultrabroadband range of 0.2–7 THz. All these properties can be combined by stacking these materials on top of each other. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2024 Electronic address https://hdl.handle.net/11104/0346412
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