Renfang Hu, Jian Chen, Faiz Wali, Shengxiang Wang, Kun Gao, Gang Liu. High efficiency positive and negative phase zone plates[J]. Chinese Optics Letters, 2017, 15(2): 020501
- Chinese Optics Letters
- Vol. 15, Issue 2, 020501 (2017)
Fig. 1. Comparison of half-period zone structure between (a) the normal PZPs and (b) the PNPZPs.
Fig. 2. Schematic diagram of PNPZPs. On the left are two different material ZPs; putting them together we have PNPZPs (right), each material being the negative phase shift material that is acceptable at the working energy.
Fig. 3. Energy dependence of the refractive-index contributions to some metals.
Fig. 4. Height of zone dependence of the first-order diffraction efficiency of the Ni PZPs at 511.9 eV.
Fig. 5. First-order diffraction efficiency as a function of the heights of the two metals at 511.9 eV.
Fig. 6. Theoretical first-order efficiency of ZPs as a function of the zone height at a working energy of 511.9 eV.
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