![Fig. 9.16 — Oscillating optical tweezers](https://i0.wp.com/opticaltweezers.org/wp-content/uploads/2015/11/Fig9_16.png?fit=660%2C330)
Power spectrum density of a microscopic particle held in an oscillating optical tweezers. It consists of a thermal background caused by Brownian motion plus a spike at fstage. The stage is moving sinusoidally with frequency fstage = 8 Hz and amplitude A = 150 nm along the x-direction.
Fig. 9.16 — Oscillating optical tweezers