Bessel beams as virtual tips for near-field optics
Bessel beams as virtual tips for near-field optics
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DOI：
10.1046/j.1365-2818.2003.01163.x
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发表时间：
2003-06-01
期刊：
影响因子：
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通讯作者：
Van Labeke, D
中科院分区：
文献类型：
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作者：
Grosjean, T;Courjon, D;Van Labeke, D
在之前的NFO会议上，我们建议使用受限的消逝光束作为“虚拟的”或“非物质的”提示。不幸的是，由于需要完美的径向偏振光束，这项技术受到了阻碍。在这种通信中，我们提出了一种简单、稳定和廉价的方法，允许产生任何偏振的光束，尤其是纯径向偏振光束。我们还从理论和实验上证明了对于近场成像系统，偏振是分辨率和光限制的一个限制因素。最后，我们给出了处理虚拟提示的第一个实验结果。
In the previous NFO meeting, we proposed the use of confined evanescent light beams as 'virtual' or 'immaterial' tips. Unfortunately, this technique was hindered by the need for perfectly radially polarized light beams. In this communication, we propose a simple, stable and cheap method allowing the generation of beams of any polarization and more especially of purely radially polarized light beams. We also demonstrate both theoretically and experimentally that for near-field imaging systems polarization is a limiting factor of resolution and light confinement. Finally, we present the very first experimental results dealing with virtual tips.