Journal
NANO LETTERS
Volume 10, Issue 4, Pages 1369-1373Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl904294u
Keywords
Surface plasmon; nanofocusing; template stripping
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Funding
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-FG02-06ER46438]
- NSF MRSEC
- University of Minnesota
- ACS PRF
- 3M Faculty Award
- ACS PRF Doctoral New Investigator Award
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We demonstrate three-dimensional plasmonic nanofocusing of light with patterned metallic pyramids obtained via template stripping. Gratings on the faces of these pyramids convert linearly polarized light into plasmons that propagate toward and converge at a similar to 10 nm apex. Experiments and computer simulations confirm that optical energy is focused into a nanoscale volume (5 x 10(-5) wavelength(3)). Because these structures are easily and reproducibly fabricated, our results could benefit many applications, including imaging, sensing, lithography, and nonlinear spectroscopy.
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