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Terahertz optical fibers [Invited].
Optics Express
|June 19, 2020
Summary
This review covers terahertz (THz) waveguides, focusing on optimal materials, fabrication, and applications. It highlights the importance of optical fibers for advancing THz technologies.
Area of Science:
- Physics
- Materials Science
- Optical Engineering
Background:
- The terahertz (THz) band, situated between optical and microwave frequencies, is gaining significant research interest.
- Optical fibers are crucial for realizing the capabilities of advanced THz systems.
- Developing efficient THz waveguides is essential for various applications.
Purpose of the Study:
- To provide a comprehensive review of terahertz waveguides.
- To discuss optimal materials, guiding mechanisms, fabrication, characterization, and applications.
- To consolidate current knowledge and identify future trends in THz fiber optics.
Main Methods:
- Review of existing literature on terahertz waveguides.
- Examination of various optical fiber types (e.g., hollow-core, photonic bandgap, metamaterial-based).
- Analysis of fabrication techniques (drilling, stacking, extrusion, 3D printing) and characterization methods (THz-TDS).
Main Results:
- Identification of optimal materials for terahertz applications.
- Discussion of diverse guiding mechanisms employed in different fiber types.
- Overview of current and historical fabrication trends.
- Summary of characterization techniques and key application areas.
Conclusions:
- Optical fibers are indispensable for terahertz technology development.
- A variety of fiber designs and fabrication methods exist, each with specific advantages.
- Terahertz waveguides have promising applications in data transmission, imaging, sensing, and spectroscopy.

