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

Kwangchil Lee, Haesung Park, Jaehoon Kim, Gumin Kang, Kyoungsik Kim

Research output: Contribution to journalArticle

17 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)1711-1718
Number of pages8
JournalOptics Express
Issue number3
Publication statusPublished - 2008 Feb 4


All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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