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Title

Three-dimensional nanoscale far-field focusing of radially polarized light by scattering the SPPs with an annular groove

Author(s)

Zhang, Maoguo;  Du, Jinglei;  Shi, Haofei;  Yin, Shaoyun;  Xia, Liangping;  Jia, Baohua;  Gu, Min;  Du, Chunlei

Abstract

Three-dimensional (3D) nanoscale focusing of radially polarized light in far field by a simple plasmonic lens composed of an annular slit and a single concentric groove is reported. The numerical calculations reveal that the incident light is coupled to surface plasmon polaritons (SPP) by the annular slit and a focal spot with a size less than a half of the illumination wavelength is formed in the far field due to the constructive interference of the scattered light by the groove. More importantly, the focal length can be modulated by changing the groove diameter. This structure provides an admirable choice for the nano-optical devices.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Micro-Photonics

Research centre

Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Micro-Photonics. Centre for Ultrahigh bandwidth Devices for Optical Systems

Source

Optics Express, Vol. 18, no. 14 (Jul 2010), pp. 14664-14670

Publication year

2010

FOR Code(s)

0205 Optical Physics;  0903 Biomedical Engineering;  1113 Ophthalmology and Optometry

Keyword(s)

Annular slits;  Beams;  Focal spots;  Plasmonic lens;  SPPs;  Surface plasmon polaritons

Publisher

Optical Society of America

ISSN

1094-4087

Publisher URL

http://dx.doi.org/10.1364/OE.18.014664

Copyright

Copyright © 2010 Optical Society of America. Published version of the paper reproduced here in accordance with the copyright policy of the publisher. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OE.18.014664. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

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