Yuyan Li

TL;DR: A planar binary phase lens is proposed and the generation of a longitudinally polarized sub-diffraction focal spot is experimentally demonstrated by focusing radially polarized light.

TL;DR: Numerical results show that compared with simple binary amplitude modulation, continuous amplitude and phase modulation can greatly improve the super-oscillation focusing performance by increasing the central lobe intensity and the ratio of its energy to the total energy, reducing the sidelobe intensity, and substantially extending the field of view.

TL;DR: A far-field sub-diffraction lens based on binary amplitude-phase mask was demonstrated under illumination of linearly polarized plane wave at wavelength 632.8 nm, which was super-oscillatory and has small sidelobes and wide field of view.

TL;DR: A far-field sub-diffraction point-focusing lens based on binary phase and amplitude modulation with ultra-long focal length 252.8 μm and small numerical aperture with great potential applications in far- field super-resolution microscopy, ultra-high-density optical storage and nano-fabrication is reported.

TL;DR: In this paper, a super-oscillation far-field focusing micro-lens based on continuous amplitude modulation is experimentally demonstrated with 40-nm thick width-varied sub-wavelength metallic slit array.