Light−Matter Interactions Enabled by THz Low-Dimensional Nanophotonic Structures

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

Deadline for manuscript submissions: 30 May 2025 | Viewed by 1151

Special Issue Editors


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Guest Editor
School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China
Interests: terahertz; vacuum electron devices; near field optics
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
GBA Branch of Aerospace Information Research Institute, Chinese Academy of Sciences, Guangzhou 510700, China
Interests: high spatial and temporal terahertz spectroscopy; ultrabroadband terahertz spectroscopy; pressure modulated terahertz spectroscopy

Special Issue Information

Dear Colleagues,

The emergence of nanophotonics has opened up exciting avenues for advancements in science and technology, particularly within the terahertz (THz) spectral domain. In this domain, electromagnetic wavelengths span from several tens of micrometers to the millimeter range. In recent years, THz technology has emerged as a frontier area, offering unprecedented opportunities for advancements in fields ranging from communication and imaging to sensing and spectroscopy. Traditional optical components and methods face challenges in focusing THz waves down to the sub-diffraction region, resulting in weak light−matter interactions at such scales. This limitation heavily impedes the development of THz micro- and nanodevices with high efficiency. Nanophotonic structures and effects have revolutionized light−matter interactions at the nanoscale, enabling the creation of a diverse range of THz functional devices with dimensions approaching the nanometer scale.

The forthcoming Special Issue on light−matter interactions enabled by THz low-dimensional nanophotonic structures promises to be an enlightening exploration into a diverse array of captivating topics within the realm of THz science and technology. This issue will serve as a comprehensive platform to delve into various aspects of THz wave generation, interactions between THz waves and matter, THz nonlinear optical effects, the fabrication and characterization of THz nanophotonic structures and materials, as well as the development of cutting-edge THz devices. By inviting contributions from leading groups in the field, we seek to provide a comprehensive overview of the current state-of-the-art in THz nanophotonics and its promising applications across various disciplines.

In this Special Issue, original research articles and reviews are welcome. Research areas may include (but are not limited to) the following:

  1. THz characterization techniques at the nanoscale;
  2. THz imaging and spectroscopy technologies;
  3. THz nanophotonic structures and materials;
  4. THz devices, including radiation sources, modulator, and detectors;
  5. THz on-chip optoelectronic systems.

We look forward to receiving your contributions.

Dr. Min Hu
Dr. Tianwu Wang
Guest Editors

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Keywords

  • terahertz
  • nanophotonics
  • light–matter interactions
  • low-dimensional structures
  • near-field

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Published Papers (1 paper)

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Research

10 pages, 2457 KiB  
Article
Angle-Controlled Nanospectrum Switching from Lorentzian to Fano Lineshapes
by Fu Tang, Qinyang Zhong, Xiaoqiuyan Zhang, Yuxuan Zhuang, Tianyu Zhang, Xingxing Xu and Min Hu
Nanomaterials 2024, 14(23), 1932; https://doi.org/10.3390/nano14231932 - 30 Nov 2024
Viewed by 769
Abstract
The tunability of spectral lineshapes, ranging from Lorentzian to Fano profiles, is essential for advancing nanoscale photonic technologies. Conventional far-field techniques are insufficient for studying nanoscale phenomena, particularly within the terahertz (THz) range. In this work, we use a U-shaped resonant ring on [...] Read more.
The tunability of spectral lineshapes, ranging from Lorentzian to Fano profiles, is essential for advancing nanoscale photonic technologies. Conventional far-field techniques are insufficient for studying nanoscale phenomena, particularly within the terahertz (THz) range. In this work, we use a U-shaped resonant ring on a waveguide substrate to achieve precise modulation of Lorentzian, Fano, and antiresonance profiles. THz scattering scanning near-field optical microscopy (s-SNOM) reveals the underlying physical mechanism of these transitions, driven by time-domain phase shifts between the background excitation from the waveguide and the resonance of the U-shaped ring. Our approach reveals a pronounced asymmetry in the near-field response, which remains undetectable in far-field systems. The ability to control spectral lineshapes at the nanoscale presents promising applications in characterizing composite nanoresonators and developing nanoscale phase sensors. Full article
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