期刊
NANO LETTERS
卷 10, 期 10, 页码 4111-4116出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl1022892
关键词
Surface plasmons; plasmonic lenses; nanohole arrays; microlens arrays; soft nanolithography
类别
资金
- NIH [DP1 OD003899]
- NSF-MRSEC [DMR-0520513]
- NSF-NSEC
- Reck Foundation
This paper reports a new type of diffractive microlens based on finite-areas of two-dimensional arrays of circular nanoholes (patches) The plasmonic microlenses can focus single wavelengths of light across the entire visible spectrum as well as broadband white light with little divergence The focal length is determined primarily by the overall size of the patch and is tolerant to significant changes in patch substructure, including lattice geometry and local order of the circular nanoholes The optical throughput, however, depends sensitively on the patch substructure and is determined by the wavelengths of surface plasmon resonances This simple diffractive lens design enables millions of broadband plasmonic microlenses to be fabricated in parallel using soft nanolithographic techniques
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