Spin-to-orbital angular momentum conversion in focusing, scattering, and imaging systems
K. Y. Bliokh, E. A. Ostrovskaya, M. A. Alonso, O. G., Rodriguez-Herrera, D. Lara, and C. Dainty
TL;DR
This paper develops a comprehensive theory for spin-to-orbital angular momentum conversion in various optical systems, enabling direct calculation and comparison of conversion efficiencies through geometric transformations.
Contribution
It introduces a universal geometric framework for analyzing spin-to-orbital angular momentum conversion in focusing, scattering, and imaging systems.
Findings
The theory allows direct calculation of AM conversion efficiency.
It provides methods for observing AM conversion via intensity and polarimetric measurements.
The framework unifies understanding across different optical configurations.
Abstract
We present a general theory of spin-to-orbital angular momentum (AM) conversion of light in focusing, scattering, and imaging optical systems. Our theory employs universal geometric transformations of nonparaxial optical fields in such systems and allows for direct calculation and comparison of the AM conversion efficiency in different physical settings. Observations of the AM conversions using local intensity distributions and far-field polarimetric measurements are discussed.
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