11 November 2014 Terahertz imaging system based on bessel beams via 3D printed axicons at 100GHz
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Terahertz (THz) imaging technology shows great advantage in nondestructive detection (NDT), since many optical opaque materials are transparent to THz waves. In this paper, we design and fabricate dielectric axicons to generate zeroth order-Bessel beams by 3D printing technology. We further present an all-electric THz imaging system using the generated Bessel beams in 100GHz. Resolution targets made of printed circuit board are imaged, and the results clearly show the extended depth of focus of Bessel beam, indicating the promise of Bessel beam for the THz NDT.
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Changming Liu, Changming Liu, Xuli Wei, Xuli Wei, Zhongqi Zhang, Zhongqi Zhang, Kejia Wang, Kejia Wang, Zhenggang Yang, Zhenggang Yang, Jinsong Liu, Jinsong Liu, "Terahertz imaging system based on bessel beams via 3D printed axicons at 100GHz", Proc. SPIE 9275, Infrared, Millimeter-Wave, and Terahertz Technologies III, 92751Q (11 November 2014); doi: 10.1117/12.2085082; https://doi.org/10.1117/12.2085082

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