Sub–Diffraction-Limited Optical Imaging with a Silver Superlens

@article{Fang2005SubDiffractionLimitedOI,
  title={Sub–Diffraction-Limited Optical Imaging with a Silver Superlens},
  author={Nicholas Xuanlai Fang and Hyesog Lee and Cheng Sun and Xiang Zhang},
  journal={Science},
  year={2005},
  volume={308},
  pages={534 - 537}
}
Recent theory has predicted a superlens that is capable of producing sub–diffraction-limited images. This superlens would allow the recovery of evanescent waves in an image via the excitation of surface plasmons. Using silver as a natural optical superlens, we demonstrated sub–diffraction-limited imaging with 60-nanometer half-pitch resolution, or one-sixth of the illumination wavelength. By proper design of the working wavelength and the thickness of silver that allows access to a broad… 
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