Tuning the focus of a plasmonic lens by the incident angle

被引：106

作者：

Liu, ZW ^{[1
]}

Steele, JM ^{[1
]}

Lee, H ^{[1
]}

Zhang, X ^{[1
]}

机构：

[1] Univ Calif Berkeley, Natl Sci Fdn, Nano Scale Sci & Engn Ctr, Berkeley, CA 94720 USA

来源：

APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 17期

关键词：

D O I：

10.1063/1.2188378

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the experimental realization of tuning the focus position of a plasmonic lens by adjusting the angle of the incident light similar to conventional lenses. A circular slit in silver film acts as both a surface plasmon polariton coupler and a plasmonic focusing lens. At small incident angles, the plasmonic lens has a very good focus with the position depending only on the angle of the incident beam. Numerical simulations of the focusing properties, including polarization dependence, agree well with experimental observations. This tunable plasmonic lens can be used in nanoscale photonics, biological sensing, and manipulation. (c) 2006 American Institute of Physics.

引用

页数：3

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