Rotation of Optically Trapped Particles in Air
We have demonstrated optically induced rotation of microscopic dielectric particles in air. The particles were anisotropically shaped, and were simultaneously trapped three-dimensionally and rotated about the beam axis, which depended solely on the radiation pressure of an extremely focused laser li...
Gespeichert in:
Veröffentlicht in: | Japanese Journal of Applied Physics 1999-07, Vol.38 (7A), p.L743 |
---|---|
Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | We have demonstrated optically induced rotation of microscopic dielectric
particles in air. The particles were anisotropically shaped, and were simultaneously
trapped three-dimensionally and rotated about the beam axis, which depended
solely on the radiation pressure of an extremely focused laser light. It was observed
that the rotational speed was linearly dependent on the irradiated beam power and
the slope of the fitting lines revealed up to 860 rpm/mW for 3.0 µm-diameter-particles
and 540 rpm/mW for 4.0 µm-diameter-particles, which was much higher than the
previously reported values measured in water. This technique will be useful for
micromotors and microfans assembled in microelectromechanical systems. |
---|---|
ISSN: | 0021-4922 1347-4065 |
DOI: | 10.1143/JJAP.38.L743 |