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Applied Physics B

, Volume 84, Issue 1–2, pp 43–47 | Cite as

Rigorous transmittance analysis of a sub-wavelength Sb thin film lens

  • F. ZhouEmail author
  • X. Gan
  • W. Xu
  • F. Gan
Article

Abstract

We quantitatively analysed the factors contributing to the optical transmission enhancement of a sub-wavelength Sb thin film lens, using the finite-difference time-domain (FDTD) method. The results show that the transmission enhancement of the dielectric with a Gaussian distributed refractive index loaded in a sub-wavelength circular hole is not only due to the high refractive index dielectric, but also due to the specific distributions of refractive index. It is the first study about the effects of the refractive index distribution on the transmission of a sub-wavelength aperture. This kind of lens has practical applications in the very small aperture lasers and for near-field optical storage and lithography.

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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  1. 1.Shanghai Institute of Optics and Fine MechanicsAcademia ChinaShanghaiP.R. China
  2. 2.Centre for Micro-PhotonicsSwinburne University of TechnologyHawthorn VictoriaAustralia

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