Technologies and Applications of Terahertz Metamaterials

A special issue of Photonics (ISSN 2304-6732). This special issue belongs to the section "Optoelectronics and Optical Materials".

Deadline for manuscript submissions: 30 June 2026 | Viewed by 696

Special Issue Editors


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Guest Editor
QiLu Aerospace Information Research Institute, Jinan 250132, China
Interests: active metasurfaces; terahertz devices; terahertz sensing
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Guest Editor
Key Laboratory of Microwave Remote Sensing, National Space Science Center, CAS, Beijing 100190, China
Interests: THz quasi optical system; satellite antenna; metamaterials and metasurface

Special Issue Information

Dear Colleagues,

Terahertz (THz) waves have exhibited promising applications in imaging, sensing, and communications, especially for the next generation of wireless communications due to the large bandwidth and abundant spectral resources. The general THz applications strongly rely on efficient modulators for free-space or on-chip applications, especially in communications that would further require high-speed modulators and low-loss waveguides. With limited natural materials that have a high-efficiency response in the terahertz band, there are many difficulties in developing terahertz-functional devices and practical applications. Metamaterials (MTMs) are artificial composite materials with arrays of strongly scattering subwavelength “meta-atoms”, which have exhibited extraordinary performance to control free-space and on-chip wave propagation. Recently, THz MTMs have become a focus of active research in many fields, such as communication, radar, imaging, and biosensing. This Special Issue will present a collection of frontier studies, technologies, reviews, and perspectives on this rapidly evolving area and aims to address the key challenges and requirements across a broad range of THz MTMs and their applications.

Dr. Haotian Ling
Dr. Guang Liu
Guest Editors

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Keywords

  • terahertz metamaterials
  • surface plasmon polaritons
  • active metamaterials
  • flexible metamaterials
  • all-dielectric terahertz metamaterials
  • metamaterials for communications
  • metamaterials for imaging
  • metamaterials for biosensing
  • other terahertz metamaterial applications

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Published Papers (1 paper)

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Research

13 pages, 1390 KB  
Article
Angle-Scanning and Size-Scaling Pixelated Quasi-BIC Metasurface Array for Broadband Terahertz Fingerprint Biosensing
by Mengya Pan, Haotian Ling, Dongjin Xin, Xijian Zhang, Yanpeng Shi and Yifei Zhang
Photonics 2025, 12(11), 1127; https://doi.org/10.3390/photonics12111127 - 14 Nov 2025
Viewed by 313
Abstract
Metasurface biosensing confronts a significant challenge in simultaneously achieving broadband response, high quality-factor (Q-factor), and ultrahigh sensitivity for specific trace-analyte detection at terahertz (THz) frequencies. Recently, quasi-bound states in the continuum (QBICs) metasurfaces provided enhanced light–matter interactions and ultrahigh sensitivity in narrow resonant [...] Read more.
Metasurface biosensing confronts a significant challenge in simultaneously achieving broadband response, high quality-factor (Q-factor), and ultrahigh sensitivity for specific trace-analyte detection at terahertz (THz) frequencies. Recently, quasi-bound states in the continuum (QBICs) metasurfaces provided enhanced light–matter interactions and ultrahigh sensitivity in narrow resonant bands. In this work, an angle-scanning QBIC metasurface array pixelated with just 5 × 5 scaling units is proposed to achieve an ultra-broad spectrum from 1 to 2.8 THz for fingerprint bio-detection. The symmetry-protected QBIC is excited by breaking the symmetry of copper block dimer resonator structures, achieving a Q-factor of 20 and a sensitivity of 500 GHz/RIU. A spectral step of approximately 10 GHz is demonstrated in this approach, and glutamic acid and glutamine are specifically detected, with detection limits reaching 15.4 μg/cm2 and 14.7 μg/cm2. This design provides a novel approach for achieving ultra-wideband, specific, and highly sensitive detection. This capability offers an efficient strategy for monitoring tumor metabolic biomarkers and paves the way for applications in early diagnosis and advanced broadband THz detection. Full article
(This article belongs to the Special Issue Technologies and Applications of Terahertz Metamaterials)
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