Abstract
We report an interferometric method to measure the dynamics of optically-trapped sub-micron particles. By exploiting the backscattered light from optically-trapped particles, we construct a Michelson-type interferometer that shows superior visibility compared to the widely-used backfocal-plane interferometry (BFPI) technique. In this report, we demonstrate the performance of our interferometric method in comparison with the BFPI technique by analyzing the axial motion of optically-trapped 150 nm polystyrene spheres. Our measurement results show more than 10 dB enhancement in the power spectrum of the axial motion compared to the conventional scheme.
| Original language | English |
|---|---|
| Pages (from-to) | 114-120 |
| Number of pages | 7 |
| Journal | New Physics: Sae Mulli |
| Volume | 66 |
| Issue number | 1 |
| DOIs | |
| State | Published - 2016.01.1 |
Keywords
- Backscattered Light
- BFPI
- Interferometer
- Optical Trap
Quacquarelli Symonds(QS) Subject Topics
- Physics & Astronomy
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