Development of a terahertz wave circular polarizer using a 2D array of metallic helix metamaterial
Abstract
We developed a broadband terahertz wave circular polarizer that consists of a two-dimensional (2D) array of three-dimensional metallic helices. Each helix operates in an axial mode of operation where the wavelength of resonance is comparable to the dimensions of the helix. We evaluated the performance of the polarizer using standard terahertz time domain spectroscopy, and we confirmed that the array of helices transmits a circularly polarized terahertz wave with opposite handedness as that of the helices. The polarizer covers the frequency range from 117 GHz to 208 GHz, close to one octave. We obtained the ellipticity of the circularly polarized terahertz wave close to unity in this frequency band.
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It has been difficult to directly generate broadband circularly polarized THz radiation; efforts to develop a THz circular polarizer or linear-to-circular polarization converter suffer from limited bandwidth up to one octave or from being bulky and difficult to deploy.
“It has been notoriously difficult to directly generate broadband circularly polarized THz radiation. Efforts have been ongoing to develop a THz circular polarizer or linear-to-circular polarization converter, but suffer either from limited bandwidth up to one octave210,211 (still much narrower than the bandwidth of typical THz pulses) or being bulky and difficult to deploy212.”
From Ultrafast terahertz emission from emerging symmetry-broken materials (2023) · cites this paper as [211]
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References 31 · Cited by 16
- Authors
- Tomita, H., Hashimoto, K., Takeya, K., & Tripathi, S. R.
- Affiliations
- Shizuoka University (JP)
- Institute for Molecular Science (JP)
- Corresponding author
- Tomita, Hiroya
- Hashimoto, Kazuma
- Takeya, Kei
- Tripathi, Saroj R.
- Venue
- Optics Letters
- Publisher
- Optica Publishing Group
- Published
- 2021-04-30
- Volume
- 46
- Issue
- 9
- Pages
- 2232
- ISSN
- 0146-9592 (ISSN-L)
- 1539-4794
- OpenAlex
- W3158511173
- Cited by
- 16
- References
- 31
- Citations by year
- 2026: 1 · 2025: 1 · 2024: 5 · 2023: 6 · 2022: 2 · 2021: 1
- FWCI
- 0.85
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Optics Letters (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Japan Society for the Promotion of Science (17K19075, 21K04174)
- Shizuoka University
- Topics
- Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Metamaterials and Metasurfaces Applications
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Terahertz technology and applications
- Physical Sciences › Engineering › Aerospace Engineering › Antenna Design and Analysis
- Keywords
- broadband polarization conversion, handedness reversal, polarization ellipticity, terahertz metamaterials
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