Electromagnetic coherence

Partial coherence and partial polarization are fundamental characteristics of light fields. Interest in them has significantly increased in recent years as the progress in optical sciences has led to the utilization of photonic components that operate in regimes necessitating full electromagnetic (vector) description. Examples of such components include optical microcavities, photonic crystal elements, and plasmonic structures involving evanescent near fields.

Researchers at UEF contribute to the development of theoretical foundation for treating polarization and electromagnetic coherence in both beam fields and general non-paraxial wave fields, including the near-field situations. The research covers both theoretical and experimental work. Recently, we have directed our research also towards quantum-field formulation of electromagnetic coherence and to the development of ghost polarimetry with classical light.



[1] A. Shevchenko, M. Roussey, A. T. Friberg, and T. Setälä, “Polarization time of unpolarized light”, Optica 4, 64 (2017).

[2] A. T. Friberg and T. Setälä, “Electromagnetic theory of optical coherence”, J. Opt. Soc. Am A 33, 2431 (2016). (Invited)

[3] A. Hannonen, A. T. Friberg, and T. Setälä, “Classical spectral ghost ellipsometry”, Opt. Lett. 41, 4943 (2016).

[4] K. Blomstedt, T. Setälä, J. Tervo, B. J. Hoenders, J. Turunen, and A. T. Friberg, “Vector-valued Lambertian fields and their sources”, Phys. Rev. A 93, 053813 (2016).

[5] A. Norrman, T. Setälä, and A. T. Friberg, “Generation and electromagnetic coherence of unpolarized three-component light fields”, Opt. Lett. 40, 5216 (2015).

[6] L.-P. Leppänen, K. Saastamoinen, A. T. Friberg, and T. Setälä, “Interferometric interpretation for the degree of polarization of optical beams”, New J. Phys. 16, 113059 (2014).