Evanescent Bessel beam generation via surface plasmon resonance excitation by a radially polarized beam
Evanescent Bessel beam generation via surface plasmon resonance excitation by a radially polarized beam
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DOI：
10.1364/ol.31.001726
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发表时间：
2006-06-01
期刊：
影响因子：
3.6
通讯作者：
Zhan, QW
中科院分区：
文献类型：
--
作者：
Zhan, QW
提出了一种产生倏逝贝塞尔光束的简单装置。当径向偏振光束强烈聚焦到电介质-金属界面上时，整个光束相对于电介质-金属界面是p偏振的，从而能够从所有方向激发表面等离子体。表面等离子体激元激发的角度选择性模仿轴棱锥的功能，导致倏逝无衍射贝塞尔光束。所产生的渐逝贝塞尔光束可以用作近场光学成像和感测应用的虚拟探针。(c)2006年美国光学学会
A simple setup for generating evanescent Bessel beams is proposed. When a radially polarized beam is strongly focused onto a dielectric-metal interface, the entire beam is p-polarized with respect to the dielectric-metal interface, enabling excitation of surface plasmons from all directions. The angular selectivity of surface plasmon excitation mimics the function of an axicon, leading to an evanescent nondiffracting Bessel beam. The created evanescent Bessel beam may be used as a virtual probe for near-field optical imaging and sensing applications. (c) 2006 Optical Society of America