Super-Resolution Imaging with Patchy Microspheres

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  • Qingqing Shang
    Nanjing Normal University
  • Fen Tang
    Nanjing Normal University
  • Lingya Yu
    Bangor University
  • Hamid Oubaha
    Université Catholique de Louvain
  • Darwin Caina
    Université Catholique de Louvain
  • Songlin Yang
    Southeast University, Nanjing
  • Sorin Melinte
    Université Catholique de Louvain
  • Chao Zuo
    Nanjing University of Science and Technology
  • James Wang
  • Ran Ye
    Nanjing Normal University
The diffraction limit is a fundamental barrier in optical microscopy, which restricts the smallest resolvable feature size of a microscopic system. Microsphere-based microscopy has proven to be a promising tool for challenging the diffraction limit. Nevertheless, the microspheres have a lowimaging contrast in air, which hinders the application of this technique. In this work, we demonstratethat this challenge can be effectively overcome by using partially Ag-plated microspheres. The deposited Ag film acts as an aperture stop that blocks a portion of the incident beam, forming a photonic hook and an oblique near-field illumination. Such a photonic hook significantly enhanced the imaging contrast of the system, as experimentally verified by imaging the Blu-ray disc surface and colloidal particle arrays
Original languageEnglish
Article number513
JournalPhotonics
Volume8
DOIs
Publication statusPublished - 15 Nov 2021

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