Photonic nanojet enhancement of backscattering of light by nanoparticles: a potential novel visible-light ultramicroscopy technique
Photonic nanojet enhancement of backscattering of light by nanoparticles: a potential novel visible-light ultramicroscopy technique
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DOI：
10.1364/opex.12.001214
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发表时间：
2004-04-05
期刊：
影响因子：
3.8
通讯作者：
Backman, V
中科院分区：
文献类型：
--
作者：
Chen, ZG;Taflove, A;Backman, V
我们报告我们认为是本地化的纳米级光子射流产生的阴影侧表面的微米级，圆形介质圆柱体的平面波照射的第一个证据。这些光子纳米射流具有小于衍射极限的腰部，并且在几个光波长上传播而没有显著的衍射。我们已经发现，这样的纳米射流可以增强可见光的后向散射的纳米尺度的介电粒子位于纳米射流内的几个数量级。不涉及倏逝场，不需要机械扫描，光子纳米喷射器可以提供一种新的手段来检测和成像的纳米粒子的大小远低于衍射极限。这可能产生一种潜在的新型超显微镜技术，使用可见光检测蛋白质，病毒颗粒，甚至单分子;并监测生物学，化学，材料科学和组织工程等许多领域的重要分子合成和聚集过程。(C)2004年美国光学学会。
We report what we believe to be the first evidence of localized nanoscale photonic jets generated at the shadow-side surfaces of micron-scale, circular dielectric cylinders illuminated by a plane wave. These photonic nanojets have waists smaller than the diffraction limit and propagate over several optical wavelengths without significant diffraction. We have found that such nanojets can enhance the backscattering of visible light by nanometer-scale dielectric particles located within the nanojets by several orders of magnitude. Not involving evanescent fields and not requiring mechanical scanning, photonic nanojets may provide a new means to detect and image nanoparticles of size well below the diffraction limit. This could yield a potential novel ultramicroscopy technique using visible light for detecting proteins, viral particles, and even single molecules; and monitoring molecular synthesis and aggregation processes of importance in many areas of biology, chemistry, material sciences, and tissue engineering. (C) 2004 Optical Society of America.