About this Research Topic
Terahertz (THz) is sandwiched between the optical/infrared wave on the short wavelength side and radio/millimeter wave on the long wavelength extreme, and it has long been considered as the last remaining gap in the electromagnetic spectrum. Its unique frequency band position makes it advantageous in high-capacity communications, imaging, and security inspection. Current application scenarios of THz radiation require powerful sources, sensitive detectors, and fast and reliable modulation devices. Over the past two decades, with the development of THz antennas, circuits, devices, systems, and applications, terahertz technology has made great progress. This waveband is very important in various applications to improve the industry and the advancement of human life, such as 5G networks, communications, measurements, medical care, biochemistry, and other fields.
The development of THz wave sources such as photoconductive antennas, THz nonlinear crystals and recently appeared quantum cascade lasers have laid a solid foundation for the generation of THz waves. At present, THz time-domain spectral systems (THz-TDS) are still the most effective tools for measuring THz waveform. Various THz detectors such as bolometers, pyrodetectors, Shottky diodes, and CMOS field-effect transistors have also developed rapidly in recent years. In addition to wave sources and detectors development, intensive research is underway to develop the element base for the THz frequency range. These studies involve birefringent materials such as liquid crystals, phase-change active materials such as vanadium dioxide, graphene, molybdenum disulfide and carbon nanotubes, the design of THz radiation modulators, such as THz polarization controllers, phase shifters, sensors, circulators and one-directional transmission isolators. However, we still need new THz materials and principles, as well as advanced THz devices and systems. A series of applications, such as 6G communications and medical imaging, are attracting us and making us ready for the opportunities and challenges brought by terahertz technology.
This Research Topic will focus on the advances of THz optics and devices. We welcome papers dealing with THz photonics, novel designs, high-performance devices and related applications. The Topics of interest include but are not limited to the following themes:
• Terahertz Physics;
• Terahertz Antennas and passive devices;
• Terahertz fibers, waveguides, components and their integration;
• Terahertz filters and transmission lines;
• Terahertz active devices and field modulation;
• Terahertz phased array antennas;
• Terahertz metamaterials and metasurfaces;
• Terahertz imaging and sensing;
• Terahertz spectroscopy;
• Terahertz radiation and detection;
• Terahertz biomedicine;
• Terahertz nano-electronic devices;
• Terahertz systems and subsystems.
The development of THz wave sources such as photoconductive antennas, THz nonlinear crystals and recently appeared quantum cascade lasers have laid a solid foundation for the generation of THz waves. At present, THz time-domain spectral systems (THz-TDS) are still the most effective tools for measuring THz waveform. Various THz detectors such as bolometers, pyrodetectors, Shottky diodes, and CMOS field-effect transistors have also developed rapidly in recent years. In addition to wave sources and detectors development, intensive research is underway to develop the element base for the THz frequency range. These studies involve birefringent materials such as liquid crystals, phase-change active materials such as vanadium dioxide, graphene, molybdenum disulfide and carbon nanotubes, the design of THz radiation modulators, such as THz polarization controllers, phase shifters, sensors, circulators and one-directional transmission isolators. However, we still need new THz materials and principles, as well as advanced THz devices and systems. A series of applications, such as 6G communications and medical imaging, are attracting us and making us ready for the opportunities and challenges brought by terahertz technology.
This Research Topic will focus on the advances of THz optics and devices. We welcome papers dealing with THz photonics, novel designs, high-performance devices and related applications. The Topics of interest include but are not limited to the following themes:
• Terahertz Physics;
• Terahertz Antennas and passive devices;
• Terahertz fibers, waveguides, components and their integration;
• Terahertz filters and transmission lines;
• Terahertz active devices and field modulation;
• Terahertz phased array antennas;
• Terahertz metamaterials and metasurfaces;
• Terahertz imaging and sensing;
• Terahertz spectroscopy;
• Terahertz radiation and detection;
• Terahertz biomedicine;
• Terahertz nano-electronic devices;
• Terahertz systems and subsystems.
Keywords: terahertz optics, terahertz devices, terahertz modulation, terahertz radiation, terahertz detection, terahertz imaging, terahertz waveguides
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