Luru Dai
Chinese Academy of Sciences
22 Papers
17 Citations
Luru Dai is an academic researcher from Chinese Academy of Sciences. The author has contributed to research in topics: Diffraction & Lens (optics). The author has an hindex of 11, co-authored 14 publications.
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Papers
Creation of Sub-diffraction Longitudinally Polarized Spot by Focusing Radially Polarized Light with Binary Phase Lens.
Anping Yu,Gang Chen,Zhihai Zhang,Zhongquan Wen,Luru Dai,Kun Zhang,Senlin Jiang,Zhixiang Wu,Yuyan Li,Changtao Wang,Xiangang Luo +10 more
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.
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Super-oscillatory focusing of circularly polarized light by ultra-long focal length planar lens based on binary amplitude-phase modulation.
Gang Chen,Yuyan Li,Anping Yu,Zhongquan Wen,Luru Dai,Li Chen,Zhihai Zhang,Senlin Jiang,Kun Zhang,Xianyou Wang,Feng Lin +10 more
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.
Generation of a sub-diffraction hollow ring by shaping an azimuthally polarized wave.
Gang Chen,Zhixiang Wu,Anping Yu,Zhihai Zhang,Zhongquan Wen,Kun Zhang,Luru Dai,Senlin Jiang,Yuyan Li,Li Chen,Changtao Wang,Xiangang Luo +11 more
TL;DR: A planar sub-diffraction diffractive lens is proposed, which has an ultra-long focal length of 600 λ and small numerical aperture of 0.64, and a sub- diffraction hollow ring is experimentally created by shaping an azimuthally polarized wave.
Planar binary-phase lens for super-oscillatory optical hollow needles.
Gang Chen,Zhixiang Wu,Anping Yu,Kun Zhang,Jing Wu,Luru Dai,Zhongquan Wen,Yinghu He,Zhihai Zhang,Senlin Jiang,Changtao Wang,Xiangang Luo +11 more
TL;DR: Numerical simulation reveals a good penetrability of the proposed optical hollow needle at an air-water interface, where the needle propagates through water with a doubled propagation distance and without loss of its super-oscillatory property.