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

Beck P, Neugebauer M, Banzer P (2020)


Publication Type: Journal article

Publication year: 2020

Journal

DOI: 10.1002/lpor.202000110

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 (Formula presented.) and a temporal resolution of (Formula presented.) 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.

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APA:

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

MLA:

Beck, Paul, Martin Neugebauer, and Peter Banzer. "Toward High-Speed Nanoscopic Particle Tracking via Time-Resolved Detection of Directional Scattering." Laser & Photonics Reviews (2020).

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