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- W2891657249 abstract "The mechanism of supperresolution found in dielectric microlenses has been a puzzle for a long time. Many proposals or models have been put forward but the underlying mechanism still remains unclear. Here we experimentally demonstrate that, when lifting a microlens above a sample, the defocused images taken by the microlens behave like those of conventional lenses, thus excluding evanescent waves as a likely mechanism for superresolution. We further employ a heating method to scan across optical resonant conditions of a microsphere while simultaneously monitoring the image resolution. The null result also excludes photonic nanojets to be the mechanism for superresolution. We also find the microlenses exhibit an interesting diameter-dependent resolving power, indicating effects beyond ray optics. Finally, we discover that the superresolution is mainly achieved by coherent imaging, assisted by surface plasmons of the underneath samples." @default.
- W2891657249 created "2018-09-27" @default.
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- W2891657249 date "2018-09-19" @default.
- W2891657249 modified "2023-10-18" @default.
- W2891657249 title "Coherent superresolution assisted by surface plasmons and the role of dielelctric microlenses" @default.
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- W2891657249 doi "https://doi.org/10.1117/12.2320396" @default.
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