Paper
12 March 2020 A simple approach to generate a monochromatic plate-like THz beam
Author Affiliations +
Proceedings Volume 11441, 2019 International Conference on Optical Instruments and Technology: IRMMW-THz Technologies and Applications; 1144107 (2020) https://doi.org/10.1117/12.2541917
Event: 2019 International Conference on Optical Instruments and Technology, 2019, Beijing, China
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.
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Zhenwei Zhang, Yuejin Zhao, Kejia Wang, and Cunlin Zhang "A simple approach to generate a monochromatic plate-like THz beam", Proc. SPIE 11441, 2019 International Conference on Optical Instruments and Technology: IRMMW-THz Technologies and Applications, 1144107 (12 March 2020); https://doi.org/10.1117/12.2541917
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KEYWORDS
Terahertz radiation

Lens design

Imaging systems

Optical components

Beam propagation method

Collimation

Free space

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