Ultra-long THz Bessel beams based on an axicon system

Hengqing Chang; Ruyi Chen; Zhenwei Zhang; Yuping Yang

doi:10.1117/12.2687289

26 November 2023 Ultra-long THz Bessel beams based on an axicon system

Hengqing Chang, Ruyi Chen, Zhenwei Zhang, Yuping Yang

Proceedings Volume 12776, Infrared, Millimeter-Wave, and Terahertz Technologies X; 127760X (2023) https://doi.org/10.1117/12.2687289
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Conference Poster

Abstract

In terahertz (THz) range, ultra-long non-diffraction Bessel beams have been theoretically and experimentally developed and consequently achieved significant advancements. Nevertheless, the balance between non-diffraction length and optical intensity is restricted and their applications have been limited in part due to their complication in access and operation, loss of energy and spectral bandwidth. In this work, a composite system composed of multiple lenses and axicon is presented to engender ultra-long terahertz Bessel beams. By manipulating the spatial relationships between various THz components, the delivery distance and non-diffraction length surpass 40cm and 2m respectively.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Hengqing Chang, Ruyi Chen, Zhenwei Zhang, and Yuping Yang "Ultra-long THz Bessel beams based on an axicon system", Proc. SPIE 12776, Infrared, Millimeter-Wave, and Terahertz Technologies X, 127760X (26 November 2023); https://doi.org/10.1117/12.2687289

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