Journal
APPLIED PHYSICS LETTERS
Volume 93, Issue 18, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3012365
Keywords
diffraction gratings; finite difference time-domain analysis; gold; light diffraction; nanoparticles; surface plasmon resonance
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Funding
- National Science Foundation (NSF)
- Defense Advanced Research Projects Agency (DARPA)
- Charles Stark Draper Laboratory
- Harvard Nanoscale Science and Engineering Center (NSEC)
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We demonstrate that coupling between grating diffraction and localized surface plasmons in two-dimensional gold nanoparticle arrays in water leads to narrow near-infrared resonance peaks in measured far field extinction spectra. Good agreement is obtained between finite difference time domain (FDTD) calculations and experimental extinction spectra. The FDTD calculations predict that the gold nanoparticle arrays exhibit near-field electric field intensity (E(2)) enhancements approximately one order of magnitude greater than those of single isolated gold nanoparticles.
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