Observations and calculations of two-dimensional angular optical scattering patterns of a
levitated bi-sphere
U. K. Krieger* and P. Meier
- Institute for Atmospheric and Climate Science, ETH Zurich, 8092 Zurich, Switzerland.
We use single bi-sphere particles levitated in an electrodynamic balance to record two-dimensional angular scattering patterns at different angles of the coordinate system of the aggregate relative to the incident laser beam. Due to Brownian motion, the particle covers the whole set of possible angles with time and allows to select patterns with high symmetry for analysis. These are qualitatively compared to numerical calculations. An experimental procedure is proposed for studying restructuring effects occurring in mixed particles upon evaporation.
- * Corresponding author