Beyond-limit light focusing in the intermediate zone
Optics
2009-01-14 v1 Plasma Physics
Abstract
We experimentally demonstrate that a new nanolens of designed plasmonic subwavelength aperture can focus light to a single-line with its width beyond the diffraction limit that sets the smallest achievable line width at half the wavelength. The measurements indicate that the effect of the near-field on the light focused is negligible in the intermediate zone of 2 < kr < 4 where the line-width is smaller than the limit. Thus, as a verification of theoretical prediction, the fields focused are radiative and with a momentum capable of propagating to the far zone as concerned by the limit.
Cite
@article{arxiv.0901.1731,
title = {Beyond-limit light focusing in the intermediate zone},
author = {K. R. Chen and W. H. Chu and H. C. Fang and C. P. Liu and C. H. Huang and H. C. Chui and C. H. Chuang and Y. L. Lo and C. Y. Lin and S. J. Chang and F. Y. Hung and H. H. Hwuang and Andy Y. -G. Fuh},
journal= {arXiv preprint arXiv:0901.1731},
year = {2009}
}
Comments
16 pages, 4 figures