Toward High‐Speed Nanoscopic Particle Tracking via Time‐Resolved Detection of Directional Scattering
Toward High‐Speed Nanoscopic Particle Tracking via Time‐Resolved Detection of Directional Scattering
复制标题
通过方向散射的时间分辨检测实现高速纳米粒子跟踪
DOI：
--
复制
发表时间：
2020
影响因子：
11
通讯作者：
P. Banzer
中科院分区：
文献类型：
--
作者：
Paul Beck;M. Neugebauer;P. Banzer
由于它们与高精度位置传感器的直接相关性，在过去的几十年中已经开发了各种不同的亚波长定位技术。然而，这些技术中的许多遭受低时间分辨率或需要昂贵的检测器。在这里，提出了一种方法，该方法是基于超快检测的定向散射光与象限光电探测器在一个大的带宽，这超过了大多数相机的速度。方向性是由于用紧密聚焦的矢量光束对高折射率纳米颗粒的位置依赖性定制激发而出现的。实验上达到了1.1nm的空间分辨率和8kHz的时间分辨率，这不是基本的，而是技术限制。该检测方案可在许多对漂移和振动敏感的光学设置中实现真实的实时颗粒跟踪和样品稳定。
Owing to their immediate relevance for high precision position sensors, a variety of different sub‐wavelength localization techniques has been developed in the past decades. However, many of these techniques suffer from low temporal resolution or require expensive detectors. Here, a method is presented that is based on the ultrafast detection of directionally scattered light with a quadrant photodetector operating at a large bandwidth, which exceeds the speed of most cameras. The directionality emerges due to the position dependent tailored excitation of a high‐refractive index nanoparticle with a tightly focused vector beam. A spatial resolution of 1.1nm and a temporal resolution of 8kHz is reached experimentally, which is not a fundamental but rather a technical limit. The detection scheme enables real‐time particle tracking and sample stabilization in many optical setups sensitive to drifts and vibrations.
影响因子：
3.6
作者：
Alaee, R.;Filter, R.;Rockstuhl, C.
通讯作者：
Rockstuhl, C.
影响因子：
4
作者：
Luxmoore, I. J.;Wasley, N. A.;Skolnick, M. S.
通讯作者：
Skolnick, M. S.