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

doi:10.1364/OE.16.001711

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

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	1711-1718
Number of pages	8
Journal	Optics Express
Volume	16
Issue number	3
DOIs	https://doi.org/10.1364/OE.16.001711
Publication status	Published - 2008 Feb 4

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

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AU - Kim, Kyoungsik

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AB - 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.

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

Abstract

All Science Journal Classification (ASJC) codes

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