Article

Three-dimensional, arbitrary orientation of focal polarization.

Institut für Angewandte Photophysik, Technische Universität Dresden, 01069 Dresden, Germany.
Applied Optics (impact factor: 1.41). 08/2010; 49(23):4479-82.
Source: PubMed

ABSTRACT We demonstrate a simple setup for generating a three-dimensional arbitrary orientation of the polarization vector in a laser focus. The key component is the superposition of a linearly and a radially polarized laser beam, which both can be controlled individually in intensity and relative phase. We exemplify the usefulness of this setup by determining the spatial orientation of a single silver nanorod in three-dimensional space by recording the angle-variable backscattered light intensity.

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Keywords

laser focus
 
radially polarized laser beam
 
relative phase
 
single silver nanorod
 
spatial orientation
 
three-dimensional arbitrary orientation
 
three-dimensional space