光场
光学
纳米光子学
物理
极化(电化学)
纳米尺度
领域(数学)
光强度
化学
数学
物理化学
量子力学
纯数学
作者
Qiyu Wang,Zehao Wang,Xiangdong Chen,Fang-Wen Sun
出处
期刊:Chinese Optics Letters
[Shanghai Institute of Optics and Fine Mechanics]
日期:2023-01-01
卷期号:21 (7): 071202-071202
标识
DOI:10.3788/col202321.071202
摘要
Modulation of a vector light field has played an important role in the research of nanophotonics. However, it is still a great challenge to accurately measure the three-dimensional vector distribution at nanoscale. Here, based on the interaction between the light field and atomic-sized nitrogen-vacancy (NV) color center in diamonds, we demonstrate an efficient method for vectorial mapping of the light-field distribution at nanoscale. Single NV centers with different but well-defined symmetry axes are selected and then interact with the same tightly focused light field. The excitation of a single NV center is related to the angle between the NV center axis and the polarization of the light field. Then the fluorescence patterns of different NV centers provide the information on the vectorial light field distribution. Subsequently analyzing the fluorescence patterns with the help of a deep neural network, the intensity and phase of the light-field vectorial components are fully reconstructed with nanometer resolution. The experimental results are in agreement with theoretical calculations. It demonstrates that our method can help to study light–matter interaction at nanoscale and extend the application of vector light fields in research on nanophotonics.
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