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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 8 — Apr. 15, 2012
  • pp: 1295–1297

Subwavelength imaging enhancement through a three-dimensional plasmon superlens with rough surface

Shaowu Huang, Haogang Wang, Kung-Hau Ding, and Leung Tsang  »View Author Affiliations

Optics Letters, Vol. 37, Issue 8, pp. 1295-1297 (2012)

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In this Letter we investigate the subwavelength imaging of a three-dimensional plasmon superlens based on the full vector wave simulations of optical wave propagation and transmission. The optical transfer functions are computed. Comparisons are made between the results of lenses with flat and periodic/random rough surfaces. We also study the problem of practical imaging system geometry using laser as an illumination source. Results show that the lens with periodic or random roughness can reduce the field interference effects, and provide improved focus on the transmission field and the Poynting flux. We illustrate that the subwavelength roughness in a plasmon lens can enhance the image resolution over a flat lens for both matched and unmatched permittivity conditions. The enhancement of resolution occurs because the introduced subwavelength roughness can amplify the evanescent wave components and suppress the surface plasmon resonance peaks.

© 2012 Optical Society of America

OCIS Codes
(100.6640) Image processing : Superresolution
(110.0110) Imaging systems : Imaging systems
(240.6680) Optics at surfaces : Surface plasmons
(290.5880) Scattering : Scattering, rough surfaces
(110.4235) Imaging systems : Nanolithography
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Imaging Systems

Original Manuscript: December 9, 2011
Revised Manuscript: January 28, 2012
Manuscript Accepted: February 1, 2012
Published: April 5, 2012

Shaowu Huang, Haogang Wang, Kung-Hau Ding, and Leung Tsang, "Subwavelength imaging enhancement through a three-dimensional plasmon superlens with rough surface," Opt. Lett. 37, 1295-1297 (2012)

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