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Far-field super-focusing by a feedback-based wavefront shaping method

机译:基于反馈的波前塑造方法的远场超聚焦

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摘要

Abbe diffraction limit has always been an important subject in conventional far-field focusing and imaging systems, where the resolution of an image is usually limited to 0.5 lambda/NA. Recently, the studies of the optical super-oscillation lens (SOL) enable us to break the limitation in both theory and practice successfully. Here a genetic algorithm was introduced to design the SOL phase more controllably and precisely obtain much better focusing such as the focal spot with 0.105 lambda/NA (or 79.0% minification) in the simulation and 65.5% minification in the experimental demonstration. This technique is of great significance in advanced optical lithography or biology microscopy, because it promises non-invasive unlabelled imaging from the far field. (C) 2019 Optical Society of America
机译:ABBE衍射极限始终是传统的远场聚焦和成像系统中的重要课题,其中图像的分辨率通常限于0.5λ/ na。 最近,光学超振动镜(SOL)的研究使我们能够在理论和实践中打破限制。 这里引入了遗传算法以设计溶胶相更可控地,并且精确地获得更好的聚焦,例如在模拟中具有0.105λ/ na(或79.0%缩小)的焦点,在实验示范中缩小65.5%。 该技术在先进的光学光刻或生物学显微镜中具有重要意义,因为它承诺从远场中的非侵入性未标记的成像。 (c)2019年光学学会

著录项

  • 来源
    《Optics Letters》 |2019年第4期|共4页
  • 作者单位

    Shanghai Jiao Tong Univ State Key Lab Adv Opt Commun Syst &

    Networks Sch Phys &

    Astron Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ State Key Lab Adv Opt Commun Syst &

    Networks Sch Phys &

    Astron Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ State Key Lab Adv Opt Commun Syst &

    Networks Sch Phys &

    Astron Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ State Key Lab Adv Opt Commun Syst &

    Networks Sch Phys &

    Astron Shanghai 200240 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 计量学;光学;
  • 关键词

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