Dimensionality of random light fields

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Abstract

Background: The spectral polarization state and dimensionality of random light are important concepts in modern optical physics and photonics. Methods: By use of space-frequency domain coherence theory, we establish a rigorous classification for the electricfield vector to oscillate in one, two, or three spatial dimensions. Results: We also introduce a new measure, the polarimetric dimension, to quantify the dimensional character of light. The formalism is utilized to show that polarized three-dimensional light does not exist, while an evanescent wave generated in total internal reflection generally is a genuine three-dimensional light field. Conclusions: The framework we construct advances the polarization theory of random light and it could be beneficial for near-field optics and polarization-sensitive applications involving complex-structured light fields.

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Norrman, A., Friberg, A. T., Gil, J. J., & Setälä, T. (2017). Dimensionality of random light fields. Journal of the European Optical Society, 13(1). https://doi.org/10.1186/s41476-017-0061-9

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