气候变化领域集成服务门户(CCPortal): Density-independent plasmons for terahertz-stable topological metamaterials

CCPortal

DOI	10.1073/pnas.2023029118
	Density-independent plasmons for terahertz-stable topological metamaterials
	Wang J.; Sui X.; Duan W.; Liu F.; Huang B.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:19
英文摘要	To efficiently integrate cutting-edge terahertz technology into compact devices, the highly confined terahertz plasmons are attracting intensive attention. Compared to plasmons at visible frequencies in metals, terahertz plasmons, typically in lightly doped semiconductors or graphene, are sensitive to carrier density (n) and thus have an easy tunability, which leads to unstable or imprecise terahertz spectra. By deriving a simplified but universal form of plasmon frequencies, here, we reveal a unified mechanism for generating unusual n-independent plasmons (DIPs) in all topological states with different dimensions. Remarkably, we predict that terahertz DIPs can be excited in a two-dimensional nodal line and one-dimensional nodal point systems, confirmed by the first-principle calculations on almost all existing topological semimetals with diverse lattice symmetries. Besides n-independence, the feature of Fermi velocity and degeneracy factor dependencies in DIPs can be applied to design topological superlattice and multiwalled carbon nanotube metamaterials for broadband terahertz spectroscopy and quantized terahertz plasmons, respectively. Surprisingly, high spatial confinement and quality factor, also insensitive to n, can be simultaneously achieved in these terahertz DIPs. Our findings pave the way for developing topological plasmonic devices for stable terahertz applications. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Electronic structures; Low-dimensional materials; Plasmon; Terahertz; Topological semimetals
语种	英语
scopus关键词	graphene; multi walled nanotube; Article; density; dispersion; electron; physical phenomena; plasmon; priority journal; spectroscopy; surface property; terahertz radiation; velocity
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238573
作者单位	Beijing Computational Science Research Center, Beijing, 100193, China; Department of Physics, Tsinghua University, Beijing, 100084, China; State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing, 100084, China; Department of Materials Science and Engineering, University of Utah, Salt Lake City, UT 84112, United States; Department of Physics, Beijing Normal University, Beijing, 100875, China
推荐引用方式 GB/T 7714	Wang J.,Sui X.,Duan W.,et al. Density-independent plasmons for terahertz-stable topological metamaterials[J],2021,118(19).
APA	Wang J.,Sui X.,Duan W.,Liu F.,&Huang B..(2021).Density-independent plasmons for terahertz-stable topological metamaterials.Proceedings of the National Academy of Sciences of the United States of America,118(19).
MLA	Wang J.,et al."Density-independent plasmons for terahertz-stable topological metamaterials".Proceedings of the National Academy of Sciences of the United States of America 118.19(2021).