Broadband plasmonic microlenses based on patches of nanoholes.
Broadband plasmonic microlenses based on patches of nanoholes.
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DOI:
10.1021/nl1022892
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发表时间:
2010-10-13
期刊:
影响因子:
10.8
通讯作者:
Odom TW
中科院分区:
文献类型:
--
作者:
Gao H;Hyun JK;Lee MH;Yang JC;Lauhon LJ;Odom TW
This paper reports a new type of diffractive microlens based on finite-areas of 2D 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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