A simple approach to generate a monochromatic plate-like THz beam

Zhenwei Zhang; Yuejin Zhao; Kejia Wang; Cunlin Zhang

doi:10.1117/12.2541917

12 March 2020 A simple approach to generate a monochromatic plate-like THz beam

Zhenwei Zhang, Yuejin Zhao, Kejia Wang, Cunlin Zhang

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.

Citation Download Citation

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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