Beilstein J. Nanotechnol.2022,13, 1220–1227, doi:10.3762/bjnano.13.101
years, the super-oscillation method based on the fine interference of optical fields has been successfully applied to sub-diffraction focusing and super-resolution imaging. However, most previously reported works only describe static super-oscillatory lenses. Super-oscillatory lenses using phase-change
materials still have issues regarding dynamic tunability and inflexibility. Therefore, it is vital to develop a flexible and tunable modulation approach for super-oscillatory lenses. In this paper, we propose a super-oscillatory step-zoom lens based on the geometric phase principle, which can switch between
tool for label-free super-resolution microscopic imaging and optical precision machining.
Keywords: geometric phase; phase-change material; step-zoom lens; super-oscillatory; Introduction
Due to the diffraction limit, conventional optical imaging systems are unable to surpass a theoretical resolution
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Figure 1:
The layout of the double-layer step-zoom metalens.