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 | |
| Publication status | Published - 2008 Feb 4 |
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
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Lee, K., Park, H., Kim, J., Kang, G., & Kim, K. (2008). Improved image quality of a Ag slab near-field superlens with intrinsic loss of absorption. Optics Express, 16(3), 1711-1718. https://doi.org/10.1364/OE.16.001711