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Journal Article

Toward High‐Speed Nanoscopic Particle Tracking via Time‐Resolved Detection of Directional Scattering

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/persons/resource/persons249806

Beck,  Paul
Interference Microscopy and Nanooptics, Leuchs Emeritus Group, Emeritus Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Institute of Optics, Information and Photonics, Department of Physics, Friedrich‐Alexander‐University Erlangen‐Nuremberg;

/persons/resource/persons201139

Neugebauer,  Martin
Interference Microscopy and Nanooptics, Leuchs Emeritus Group, Emeritus Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Institute of Optics, Information and Photonics, Department of Physics, Friedrich‐Alexander‐University Erlangen‐Nuremberg;

/persons/resource/persons201008

Banzer,  Peter
Interference Microscopy and Nanooptics, Leuchs Emeritus Group, Emeritus Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Institute of Optics, Information and Photonics, Department of Physics, Friedrich‐Alexander‐University Erlangen‐Nuremberg;

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lpor.202000110.pdf
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Citation

Beck, P., Neugebauer, M., & Banzer, P. (2020). Toward High‐Speed Nanoscopic Particle Tracking via Time‐Resolved Detection of Directional Scattering. Laser & Photonics Reviews, 2000110. doi:10.1002/lpor.202000110.


Cite as: https://hdl.handle.net/21.11116/0000-0006-D6B9-8
Abstract
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.