Abstract
We report that the transverse trapping efficiency for a metallic particle can be enhanced by use of a laser beam obstructed by a circular opaque disk. In the case of gold particles, the enhancement factor for a p- or s-polarized trapping beam is at least 1.7 or 2.5, respectively. The dependence of the transverse trapping efficiency for gold particles (diameter=2 μm) on the size of the obstruction is measured and agrees with the theoretical prediction based on the ray-optics model.
| Original language | English |
|---|---|
| Pages (from-to) | 34-36 |
| Number of pages | 3 |
| Journal | Applied Physics Letters |
| Volume | 77 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 3 Jul 2000 |
| Externally published | Yes |