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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 3 — Feb. 4, 2008
  • pp: 1711–1718

Improved image quality of a Ag slab near-field superlens with intrinsic loss of absorption

Kwangchil Lee, Haesung Park, Jaehoon Kim, Gumin Kang, and Kyoungsik Kim  »View Author Affiliations

Optics Express, Vol. 16, Issue 3, pp. 1711-1718 (2008)

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Intrinsic loss of absorption in the Ag slab near-field superlens turned out to add a blurring effect to the ideal image reconstruction for the impedance match case. By optimizing the real part of the permittivity (ε′) of Ag, our FDTD calculation predicts ~69% enhancement of visibility and ~138% increased depth of field for the intensity contrast of 0.5 with similar focal spot size. For a near-field superlens with the higher absorption loss, the optimized image quality is obtained with a larger impedance mismatch, which can be realized by changing the wavelength of incident light for imaging.

© 2008 Optical Society of America

OCIS Codes
(120.5710) Instrumentation, measurement, and metrology : Refraction
(160.4670) Materials : Optical materials
(350.3618) Other areas of optics : Left-handed materials

ToC Category:
Imaging Systems

Original Manuscript: November 1, 2007
Revised Manuscript: January 20, 2008
Manuscript Accepted: January 21, 2008
Published: January 24, 2008

Kwangchil Lee, Haesung Park, Jaehoon Kim, Gumin Kang, and Kyoungsik Kim, "Improved image quality of a Ag slab near-field superlens with intrinsic loss of absorption," Opt. Express 16, 1711-1718 (2008)

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