Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5449000 | Optics Communications | 2017 | 10 Pages |
Abstract
The spatial resolution of a standard optical microscope (SOM) is limited by diffraction. In visible spectrum, SOM can provide â¼200nm resolution. To break the diffraction limit several approaches were developed including scanning near field microscopy, metamaterial super-lenses, nanoscale solid immersion lenses, super-oscillatory lenses, confocal fluorescence microscopy, techniques that exploit non-linear response of fluorophores like stimulated emission depletion microscopy, stochastic optical reconstruction microscopy, etc. Recently, photonic nanojet generated by a dielectric microsphere was used to break the diffraction limit. The microsphere-approach is simple, cost-effective and can be implemented under a standard microscope, hence it has gained enormous attention for super-resolution imaging. In this article, we briefly review the microsphere approach and its applications for super-resolution imaging in various optical imaging modalities.
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Authors
Paul Kumar Upputuri, Manojit Pramanik,