期刊
NANO LETTERS
卷 14, 期 4, 页码 2079-2085出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl500238h
关键词
Surface plasmons; nanoparticles; collective resonances; near-field optical microscopy (SNOM); near-field patterns; Rayleigh anomalies
类别
资金
- Spanish MINECO [CSD2008-00023, MAT2011-29194-C02-01]
- Comunidad de Madrid [S2009/MAT-1726, S2009/TIC-1476]
- Spanish MINECO through FPI
In this work we discuss the excitation of parallel collective resonances in arrays of gold nanoparticles. Parallel collective resonances result from the coupling of the nanoparticles localized surface plasmons with diffraction orders traveling in the direction parallel to the polarization vector. While they provide field enhancement and delocalization as the standard collective resonances, our results suggest that parallel resonances could exhibit greater tolerance to index asymmetry in the environment surrounding the arrays. The near- and far-field properties of these resonances are analyzed, both experimentally and numerically.
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