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Nanomaterials
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Recent Progress in Terahertz Nano-Metamaterials
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Recent Progress in Terahertz Nano-Metamaterials

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanophotonics Materials and Devices".

Deadline for manuscript submissions: 25 July 2025 | Viewed by 1014

Special Issue Editors

Prof. Dr. Bin Tang

E-Mail Website
Guest Editor
School of Microelectronics and Control Engineering, Changzhou University, Changzhou 213164, China
Interests: micro/nano-optics; metamaterials; metasurface; plasmonics; nanophotonics; functional nanomaterials; terahertz devices and applications
Special Issues, Collections and Topics in MDPI journals
Dr. Wei Su

E-Mail Website
Guest Editor
College of Science, Hohai University, Nanjing 211100, China
Interests: metasurface device design based on machine learning

Special Issue Information

Dear Colleagues,

The field of terahertz (THz) nano-metamaterials has witnessed remarkable advancements in recent years, driven by their potential to revolutionize applications in sensing, imaging, and communication. These engineered materials, with sub-wavelength structural features, enable precise control over THz wave propagation, overcoming the challenges posed by conventional materials. Researchers have developed novel designs, such as tunable and active metamaterials, leveraging cutting-edge fabrication techniques like 3D nano-printing and lithography. Such innovations have led to enhanced performance in manipulating electromagnetic waves, including unprecedented control over absorption, reflection, and transmission properties, paving the way for new breakthroughs in the THz spectrum.

This Special Issue invites original contributions exploring the latest developments in THz nano-metamaterials. We welcome theoretical and experimental studies, including advances in design methodologies, material synthesis, and device integration. Topics of interest include, but are not limited to, tunable metamaterials, nonlinear and quantum-enhanced devices, and their applications in security, biomedical diagnostics, and wireless communication. By assembling diverse perspectives, this Special Issue aims to chart the future direction of THz metamaterial research, bridging the gap between fundamental science and real-world applications.

Prof. Dr. Bin Tang
Dr. Wei Su
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Nanomaterials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • terahertz metamaterials
  • metasurface
  • plasmon-induced absorption/transparency
  • bound states in the continuum (BIC) and quasi-BIC in metamaterials
  • inverse design
  • machine learning
  • smart materials

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Published Papers (2 papers)

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12 pages, 4244 KiB  
Article
Borophene-Based Anisotropic Metamaterial Perfect Absorber for Refractive Index Sensing
by Zichen Lin, Haorui Yang, Gui Jin, Ying Zhu and Bin Tang
Nanomaterials 2025, 15(7), 509; https://doi.org/10.3390/nano15070509 - 28 Mar 2025
Cited by 1 | Viewed by 251
Abstract
Borophene, as a novel two-dimensional (2D) material, has garnered significant interest due to its exceptional optoelectronic properties, including anisotropic plasmonic response high carrier mobility, etc. In this work, we theoretically propose a borophene-based anisotropic metamaterial perfect absorber using the finite-difference time-domain (FDTD) method. [...] Read more.
Borophene, as a novel two-dimensional (2D) material, has garnered significant interest due to its exceptional optoelectronic properties, including anisotropic plasmonic response high carrier mobility, etc. In this work, we theoretically propose a borophene-based anisotropic metamaterial perfect absorber using the finite-difference time-domain (FDTD) method. The research results show that the proposed metamaterial exhibits triple-band perfect electromagnetic absorption characteristics when the polarization direction of electromagnetic wave is along the zigzag direction of borophene, and the resonant absorption wavelengths can be adjusted by varying the carrier mobility of borophene. Furthermore, as an application of the proposed perfect absorber, we investigate the refractive sensing properties of the borophene-based metamaterial. When the carrier density of borophene is 4.0 × 1019 m−2, the maximum refractive index sensitivity of the designed absorber is up to 867 nm/RIU, with a figure of merit of 11.71 RIU−1, which has promising applications in the field of biochemical sensing and special environmental detection. Full article
(This article belongs to the Special Issue Recent Progress in Terahertz Nano-Metamaterials)
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11 pages, 6021 KiB  
Article
Merging of Accidental Bound States in the Continuum in Symmetry and Symmetry-Broken Terahertz Photonic Crystal Slabs
by Jiale Chen, Jianjun Liu, Fangzhou Shu, Yong Du and Zhi Hong
Nanomaterials 2025, 15(6), 451; https://doi.org/10.3390/nano15060451 - 16 Mar 2025
Viewed by 530
Abstract
Recently, the merging of accidental bound states in the continuum (BICs) has attracted significant attention due to the enhanced light–matter interactions. Here, we theoretically demonstrate the merging of accidental BICs in perturbed all-silicon terahertz photonic crystal (PhC) slabs with C2 and C [...] Read more.
Recently, the merging of accidental bound states in the continuum (BICs) has attracted significant attention due to the enhanced light–matter interactions. Here, we theoretically demonstrate the merging of accidental BICs in perturbed all-silicon terahertz photonic crystal (PhC) slabs with C2 and C2 broken-symmetry structures. The PhC slabs consist of an array of four cylindrical holes and support a TM symmetry protected (SP) vector BIC at the Γ point. Our results indicate that the merging and band transition of accidental BICs can be achieved by varying the diameter of diagonal holes in a C2-symmetry structure. Notably, in a C2 broken-symmetry PhC slab, the SP BIC will first convert to a quasi-BIC, then transit to a new accidental BIC, which are well displayed and interpreted by tracing the accidental BICs in momentum space. We believe that the results presented in this work show potential for the design and application of BICs in both symmetric and asymmetric PhC slabs. Full article
(This article belongs to the Special Issue Recent Progress in Terahertz Nano-Metamaterials)
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