Hui Yin, Jiaqi Li, Huawei Liang, Min Zhang, Hong Su, Ireng Ling Li, "Full-transparent zone plates for THz focusing," Chin. Opt. Lett. 16, 082601 (2018)

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- Chinese Optics Letters
- Vol. 16, Issue 8, 082601 (2018)

Fig. 1. Schematics of the (a) FZP and (b) FTZP.

Fig. 2. Dependence of the THz wave transmission on the substrate thickness. The peak intensity at the focal point for the focal length f = 5 cm is shown by the point solid line, and the transmission rate is shown by the dashed line.

Fig. 3. THz field intensities on the longitudinal sections for the focusing of FTZPs: (a) f = 4 cm , (b) f = 5 cm , (c) f = 6 cm ; and FZPs: (d) f = 4 cm , (e) f = 5 cm , (f) f = 6 cm .

Fig. 4. (a) Experimental setup for the FTZP focusing. (b) FTZP sample.

Fig. 5. Measured THz intensity distributions on the focal planes for FTZPs: (a) f = 4 cm , (b) f = 5 cm , (c) f = 6 cm ; and FZPs: (d) f = 4 cm , (e) f = 5 cm , (f) f = 6 cm .

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