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Proceedings Paper

Subwavelength focusing of nanopatterned photon sieves
Author(s): Yinfei Xue; Weihao Ge; Chinhua Wang; Bing Cao
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Paper Abstract

A novel subwavelength focusing using an nanohole patterned structure or nano-photon sieves(NPS) is proposed. By employing a nanohole array instead of the ring pattern in conventional Fresnel micro-zone-plate(FMZP) and incorporating a Gaussian modulation function on the density of the nanohole array, it is found that the side lobes of the NPS can be effectively suppressed compared with that of FMZP and both the intensity distribution of focal spot and the side-lobes of focal spot exhibit better symmetric behavior than that of the FMZP. The intensity of electric field at the focal plane can be further improved by introducing a multi-layer system with a dielectric transition layer(i.e. NaF).

Paper Details

Date Published: 17 November 2010
PDF: 9 pages
Proc. SPIE 7848, Holography, Diffractive Optics, and Applications IV, 784829 (17 November 2010); doi: 10.1117/12.870021
Show Author Affiliations
Yinfei Xue, Soochow Univ. (China)
Weihao Ge, Soochow Univ. (China)
Chinhua Wang, Soochow Univ. (China)
Bing Cao, Soochow Univ. (China)

Published in SPIE Proceedings Vol. 7848:
Holography, Diffractive Optics, and Applications IV
Yunlong Sheng; Chongxiu Yu; Linsen Chen, Editor(s)

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