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Terajet effect of dielectric sphere and THz imaging
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Paper Abstract

Analogous to microsphere optical nanoscope, an easy and low-price method of THz imaging is proposed and developed for improving the spatial resolution beyond the diffraction limit. By attaching a 2-4 mm diameter Teflon sphere, a narrow, high-intensity, subdiffraction-waist THz beam with a strong jet-like distribution propagates into the background medium from the sphere’s shadow-side surface and a subwavelength spatial resolution better than λ/3 is demonstrated. Furthermore, the dielectric sphere-coupled THz microscope not only enables far-field, large-area measurement but also characterizes high-throughput and broad-band imaging properties. In addition, the size effect on terajet of dielectric sphere was simulated and shows that its magnification capability and focal length are size-dependent and frequencysensitive.

Paper Details

Date Published: 9 November 2018
PDF: 7 pages
Proc. SPIE 10826, Infrared, Millimeter-Wave, and Terahertz Technologies V, 1082606 (9 November 2018); doi: 10.1117/12.2500909
Show Author Affiliations
Qingshan Qu, Minzu Univ. of China (China)
Hailing Liu, Minzu Univ. of China (China)
Di Zhu, Beijing Univ. of Posts and Telecommunications (China)
Menghan Yang, Minzu Univ. of China (China)
Bin Cui, Minzu Univ. of China (China)
Shuai Feng, Minzu Univ. of China (China)
Yuping Yang, Minzu Univ. of China (China)


Published in SPIE Proceedings Vol. 10826:
Infrared, Millimeter-Wave, and Terahertz Technologies V
Cunlin Zhang; Xi-Cheng Zhang; Masahiko Tani, Editor(s)

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