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Proceedings Paper

A simple approach to generate a monochromatic plate-like THz beam
Author(s): Zhenwei Zhang; Yuejin Zhao; Kejia Wang; Cunlin Zhang
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Paper Abstract

We design a simple optical element to generate a monochromatic plate-like diffraction-free terahertz (THz) beam. By using 3D-printing technology, this element can be fabricated easily and quickly. Numerical and experimental results show that the output beam of such element has a one-dimensional (1D) invariant transverse profile, i.e. it is a plate-like THz beam in free space. In order to make this kind of beam more practical, we design a lens group system to increase the diffraction-free length from 5cm to more than 20cm. In addition, a fast numerical algorithm based on diffraction integral has been built to analyze the measured results.

Paper Details

Date Published: 12 March 2020
PDF: 6 pages
Proc. SPIE 11441, 2019 International Conference on Optical Instruments and Technology: IRMMW-THz Technologies and Applications, 1144107 (12 March 2020); doi: 10.1117/12.2541917
Show Author Affiliations
Zhenwei Zhang, Beijing Institute of Technology (China)
Capital Normal Univ. (China)
Yuejin Zhao, Beijing Institute of Technology (China)
Kejia Wang, Capital Normal Univ. (China)
Huazhong Univ. of Science and Technology (China)
Cunlin Zhang, Capital Normal Univ. (China)


Published in SPIE Proceedings Vol. 11441:
2019 International Conference on Optical Instruments and Technology: IRMMW-THz Technologies and Applications
Cunlin Zhang; Xi-Cheng Zhang; Zhiming Huang, Editor(s)

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