AI Article Synopsis
- Terahertz technology has seen rapid advancements in the last decade, particularly in areas like wireless communication and imaging, leading to the development of various devices such as filters and modulators.
- Terahertz phase modulation is a key focus of research, enabling flexible control of terahertz waves for applications in wireless communication, high-resolution imaging, and radar systems.
- This review examines progress in terahertz phase modulators, detailing both free space and guided wave integration methods, along with the impact of different tunable materials on their performance and future trends in the field.
Article Abstract
In the past ten years, terahertz technology has developed rapidly in wireless communications, spectroscopy, and imaging. Various functional devices have been developed, such as filters, absorbers, polarizers, mixers, and modulators. Among these, the terahertz phase modulation is a current research hotspot. It is the core technology to realize flexible control of the terahertz wavefront, beam scanning, focusing deflection. It is indispensable in terahertz wireless communication, high-resolution imaging, and radar systems. This review summarizes the research progress of terahertz phase modulators from the two major types: free space and guided wave integration. Among these, the free space terahertz phase modulator is realized by combining the tunable materials and artificial metasurfaces. Based on different types of tunable materials, the terahertz free space phase modulator combining the semiconductor, liquid crystal, phase change materials, graphene, and other two-dimensional materials are introduced, and the influence of different materials on the phase modulation performance is discussed and analyzed. The monolithic integration and waveguide embedding methods are introduced separately, and the characteristics of different forms of terahertz-guided wave phase modulation are also discussed. Finally, the development trends of terahertz phase modulators, possible new methods, and future application requirements are discussed.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11501851 | PMC |
| http://dx.doi.org/10.1515/nanoph-2021-0623 | DOI Listing |
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