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- Title
Super-Resolution Imaging with Patchy Microspheres.
- Authors
Shang, Qingqing; Tang, Fen; Yu, Lingya; Oubaha, Hamid; Caina, Darwin; Yang, Songlin; Melinte, Sorin; Zuo, Chao; Wang, Zengbo; Ye, Ran
- Abstract
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 low imaging contrast in air, which hinders the application of this technique. In this work, we demonstrate that 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.
- Subjects
HIGH resolution imaging; IMAGING systems; MICROSCOPY; BLU-ray discs; MOTION picture acting; COLLOIDAL crystals; MICROSPHERES
- Publication
Photonics, 2021, Vol 8, Issue 11, p513
- ISSN
2304-6732
- Publication type
Article
- DOI
10.3390/photonics8110513