Metamaterials for Terahertz Photonics: Enabling Novel Techniques

A special issue of Photonics (ISSN 2304-6732).

Deadline for manuscript submissions: closed (31 August 2024) | Viewed by 1831

Special Issue Editors


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Guest Editor
School of Physics, Zhengzhou University, Zhengzhou 450001, China
Interests: metasurface; terahertz photonics; ultrafast optics; diffractive optical elements
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Guest Editor
School of Precision Instruments and Optoelectronics Engineering, Tianjin University, Tianjin, China
Interests: terahertz all-silicon metasurfaces; terahertz tunable metamaterials; terahertz structured light field modulation

Special Issue Information

Dear Colleagues,

Terahertz waves have a wide range of promising applications in fields such as security inspections, material detection, and communications. With the development of terahertz photonics, various terahertz techniques have also emerged in recent years. Metamaterials, as subwavelength optical elements, have efficient and abundant modulation capabilities of electromagnetic waves. The design strategy of phase mutation is introduced at the interface, breaking the design limitation of traditional optical components. It provides significant convenience for controlling the wavefront of electromagnetic waves. Based on the generalized Snell law, researchers have proposed a variety of metasurface devices with rich functions, including meta-holography, metalens, vortex beams, vector polarization, surface waves, and so on.

This Special Issue welcomes both simulation and experimental research and addresses the latest progress on Metamaterials and Terahertz Photonics.

The following areas are of interest:
  • Metasurfaces and metamaterials;
  • Waveguides, fiber, and photonic crystals;
  • Nanophotonics and plasmonics;
  • Biophotonics;
  • Structured light field modulation;
  • Nonlinear and ultrafast optics;
  • Integrated optics;
  • Terahertz applications such as radars, wireless, and wired communications.

Dr. Chenglong Zheng
Dr. Hui Li
Guest Editors

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Keywords

  • terahertz
  • metamaterials
  • polarization

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Published Papers (1 paper)

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Research

10 pages, 3284 KiB  
Article
Simulation Study on Tunable Terahertz Bandpass Filter Based on Metal–Silicon–Metal Metasurface
by Wenjun Liu and Jitao Li
Photonics 2024, 11(6), 559; https://doi.org/10.3390/photonics11060559 - 13 Jun 2024
Viewed by 1121
Abstract
Metasurface devices have demonstrated powerful electromagnetic wave manipulation capabilities. By adjusting the shape and size parameters of the metasurface microstructure, we can control the resonance between spatial electromagnetic waves and the metasurface, which will trigger wave scattering at a specific frequency. By utilizing [...] Read more.
Metasurface devices have demonstrated powerful electromagnetic wave manipulation capabilities. By adjusting the shape and size parameters of the metasurface microstructure, we can control the resonance between spatial electromagnetic waves and the metasurface, which will trigger wave scattering at a specific frequency. By utilizing these characteristics, we design a metasurface device with a bandpass filtering function and a unit cell of the metasurface consisting of a double-layer pinwheel-shaped metal structure and high resistance silicon substrate (forming metal–silicon–metal configuration). A bandpass filter operating in the terahertz band has been implemented, which achieves a 36 GHz filtering bandwidth when the transmission amplitude decreases by 3 dB and remains effective in a wave incidence angle of 20°. This work uses an equivalent RC resonance circuit to explain the formation of bandpass filtering. In addition, the photosensitive properties of silicon enable the filtering function of the device to have on/off tuned characteristics under light excitation, which enhances the dynamic controllability of the filter. The designed device may have application prospects in 6G space communication. Full article
(This article belongs to the Special Issue Metamaterials for Terahertz Photonics: Enabling Novel Techniques)
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