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Direct observation of the topological charge of a terahertz vortex beam generated by a Tsurupica spiral phase plate
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- K. Miyamoto
- Chiba University 1 Graduate School of Advanced Integration Science, , 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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- K. Suizu
- Chiba Institute of Technology 2 Department of Electrical, Electronics and Computer Engineering, , 2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan
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- T. Akiba
- Chiba Institute of Technology 2 Department of Electrical, Electronics and Computer Engineering, , 2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan
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- T. Omatsu
- Chiba University 1 Graduate School of Advanced Integration Science, , 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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Description
<jats:p>A terahertz (THz) spiral phase plate with high transmission (>90% after Fresnel correction) and low dispersion has been developed based on the Tsurupica olefin polymer. Direct observations of the topological charge (both magnitude and sign) of a THz vortex beam are performed by using a THz camera with tilted lens focusing and radial defect introduction. The vortex outputs with a topological charge of ±1 (or ±2) are obtained at a frequency of 2 (or 4) THz.</jats:p>
Journal
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- Applied Physics Letters
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Applied Physics Letters 104 (26), 261104-, 2014-06-30
AIP Publishing
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Details 詳細情報について
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- CRID
- 1360283692078756736
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- ISSN
- 10773118
- 00036951
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- Article Type
- journal article
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- Data Source
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- Crossref
- KAKEN
- OpenAIRE