Reciprocity in scanning near-field optical microscopy: illumination and collection modes of transmission measurements.
Reciprocity in scanning near-field optical microscopy: illumination and collection modes of transmission measurements.
复制标题
DOI：
10.1364/ol.31.001474
复制
发表时间：
2006-05
期刊：
影响因子：
3.6
通讯作者：
K. Imura;H. Okamoto
中科院分区：
文献类型：
--
作者：
K. Imura;H. Okamoto
我们实验研究了扫描近场光学显微镜在照明和采集模式之间的互易性。两种模式观测到的单金球和纳米棒的近场透射图像在可见光到近红外范围内是等效的。结果表明，互易性适用于近场散射问题。我们发现传统的远场激励的光学选择规则不仅在照明模式下适用，而且在收集模式安排下也不适用。这一观测的可能来源可能是近场探测器。
We experimentally investigated the reciprocity of scanning near-field optical microscopy between illumination and collection modes. Near-field transmission images of single gold spheres and nanorods observed by the two modes are found to be equivalent to each other in the region from visible to near infrared. This result shows that reciprocity holds for the near-field scattering problems. We found that the conventional optical selection rule for far-field excitations does not apply not only under illumination mode but also with collection-mode arrangements. The possible origin of this observation might be the near-field probe.