Journal
NATURE PHOTONICS
Volume 3, Issue 7, Pages 388-394Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHOTON.2009.111
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Funding
- Japan Science and Technology Corporation
- RIKEN Extreme Photonics programme
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Diffraction of light prevents optical microscopes from having spatial resolution beyond a value comparable to the wavelength of the probing light. This essentially means that visible light cannot image nanomaterials. Here we review the mechanism for going beyond this diffraction limit and discuss how manipulation of light by means of surface plasmons propagating along the metal surface can help to achieve this. The interesting behaviour of light under the influence of plasmons not only allows superlensing, in which perfect imaging is possible through a flat thin metal film, but can also provide nano-imaging of practical samples by using a localized surface plasmon mode at the tip of a metallic nanoprobe. We also discuss the current research status and some intriguing future possibilities.
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