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- Title
Diffraction Interference Induced Superfocusing in Nonlinear Talbot Effect.
- Authors
Dongmei Liu; Yong Zhang; Jianming Wen; Zhenhua Chen; Dunzhao Wei; Xiaopeng Hu; Gang Zhao; Zhu, S. N.; Min Xiao
- Abstract
We report a simple, novel subdiffraction method, i.e. diffraction interference induced superfocusing in second-harmonic (SH) Talbot effect, to achieve focusing size of less than λSH/4 (or λpump/8) without involving evanescent waves or subwavelength apertures. By tailoring point spread functions with Fresnel diffraction interference, we observe periodic SH subdiffracted spots over a hundred of micrometers away from the sample. Our demonstration is the first experimental realization of the Toraldo di Francia's proposal pioneered 62 years ago for superresolution imaging.
- Subjects
NONLINEAR optics; WAVELENGTHS; TALBOT'S law (Optics); MICROSTRUCTURE; OPTICAL properties; HIGH resolution imaging
- Publication
Scientific Reports, 2014, p1
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/srep06134