Diffraction Interference Induced Superfocusing in Nonlinear Talbot Effect
Optics
2014-09-10 v2
Abstract
We report a simple, novel sub-diffraction method, i.e. diffraction interference induced super-focusing in second-harmonic (SH) Talbot effect, to achieve focusing size of less than {\lambda}_pump/8 without involving evanescent waves or sub-wavelength apertures. By tailoring point spread functions with Fresnel diffraction interference, we observe periodic SH sub-diffracted spots over a hundred of micrometers away from the sample. Our demonstration is the first experimental realization of the proposal by Toraldo Di Francia pioneered 60 years ago for super-resolution imaging.
Cite
@article{arxiv.1304.2556,
title = {Diffraction Interference Induced Superfocusing in Nonlinear Talbot Effect},
author = {Dongmei Liu and Yong Zhang and Jianming Wen and Zhenhua Chen and Dunzhao Wei and Xiaopeng Hu and Gang Zhao and S. N. Zhu and Min Xiao},
journal= {arXiv preprint arXiv:1304.2556},
year = {2014}
}