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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 18 — Sep. 5, 2005
  • pp: 6815–6820

Beam manipulating by metallic nano-slits with variant widths

Haofei Shi, Changtao Wang, Chunlei Du, Xiangang Luo, Xiaochun Dong, and Hongtao Gao  »View Author Affiliations

Optics Express, Vol. 13, Issue 18, pp. 6815-6820 (2005)

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A novel method is proposed to manipulate beam by modulating light phase through a metallic film with arrayed nano-slits, which have constant depth but variant widths. The slits transport electro-magnetic energy in the form of surface plasmon polaritons (SPPs) in nanometric waveguides and provide desired phase retardations of beam manipulating with variant phase propagation constant. Numerical simulation of an illustrative lens design example is performed through finite-difference time-domain (FDTD) method and shows agreement with theory analysis result. In addition, extraordinary optical transmission of SPPs through sub-wavelength metallic slits is observed in the simulation and helps to improve elements�?? energy using factor.

© 2005 Optical Society of America

OCIS Codes
(220.2560) Optical design and fabrication : Propagating methods
(240.0310) Optics at surfaces : Thin films
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Research Papers

Original Manuscript: June 27, 2005
Revised Manuscript: August 19, 2005
Published: September 5, 2005

Haofei Shi, Changtao Wang, Chunlei Du, Xiangang Luo, Xiaochun Dong, and Hongtao Gao, "Beam manipulating by metallic nano-slits with variant widths," Opt. Express 13, 6815-6820 (2005)

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