Brownian Speedcam
Optics & Photonics Focus
Volume 10 Story 1 - 19/7/2010

The optical trap and the speed of a Brownian particle

The focused green laser holds a Brownian particle. The scattering from the particle gives information about the instantaneous position of the particle and it is recorded 75 million times per second using a novel photodetector. The position increments tell show the researchers the instantaneous speed of the particle.
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The optical trap and the speed of a Brownian particle. The focused green laser holds a Brownian particle. The scattering from the particle gives information about the instantaneous position of the particle and it is recorded 75 million times per second using a novel photodetector. The position increments tell show the researchers the instantaneous speed of the particle.