Vectorial Doppler metrology

The Doppler effect is a universal wave phenomenon that has spurred a myriad of applications. In early manifestations, it was implemented by interference with a reference wave to infer linear velocities along the direction of motion, and more recently lateral and angular velocities using scalar phase...

Full description

Saved in:
Bibliographic Details
Published in:Nature communications 2021-07, Vol.12 (1), p.4186-4186, Article 4186
Main Authors: Fang, Liang, Wan, Zhenyu, Forbes, Andrew, Wang, Jian
Format: Article
Language:English
Subjects:
639/624/1075/1083
639/624/1111/1116
639/624/400
639/766/400
Angular velocity
Anisotropy
Doppler effect
Humanities and Social Sciences
Light effects
Metrology
Motion perception
Moving targets
multidisciplinary
Particle spin
Polarization
Rotation
Science
Science (multidisciplinary)
Velocity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The Doppler effect is a universal wave phenomenon that has spurred a myriad of applications. In early manifestations, it was implemented by interference with a reference wave to infer linear velocities along the direction of motion, and more recently lateral and angular velocities using scalar phase structured light. A consequence of the scalar wave approach is that it is technically challenging to directly deduce the motion direction of moving targets. Here we overcome this challenge using vectorially structured light with spatially variant polarization, allowing the velocity and motion direction of a moving particle to be fully determined. Using what we call a vectorial Doppler effect, we conduct a proof of principle experiment and successfully measure the rotational velocity (magnitude and direction) of a moving isotropic particle. The instantaneous position of the moving particle is also tracked under the conditions of knowing its starting position and continuous tracking. Additionally, we discuss its applicability to anisotropic particle detection, and show its potential to distinguish the rotation and spin of the anisotropic particle and measure its rotational velocity and spin speed (magnitude and direction). Our demonstration opens the path to vectorial Doppler metrology for detection of universal motion vectors with vectorially structured light. The Doppler effect is a wave phenomenon that can find the magnitude of velocity of moving targets with scalar waves. Here, the authors use vectorially structured light with spatially variant polarization to fully determine both the magnitude of velocity and motion direction of a moving particle.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-021-24406-z