Experimental determining the coherent-mode structure of vector electromagnetic field through its decomposition in...

Area of Science:

• Optics and Photonics
• Electromagnetism

Background:

• Coherent-mode structure is crucial for understanding electromagnetic fields.
• Existing methods for determining this structure have limitations.

Purpose of the Study:

• To propose a novel technique for experimentally determining the coherent-mode structure of electromagnetic fields.
• To generalize existing correlation methods for broader applicability.

Main Methods:

• The technique relies on coherence measurements in a reference basis.
• It is a vector generalization of the dual-mode field correlation method.
• Experimental characterization of a secondary electromagnetic source was performed.

Main Results:

• The proposed technique was successfully applied to determine the coherent-mode structure.
• The method demonstrated its justifiability and efficiency.
• The results validate the vector generalization approach.

Conclusions:

• The developed technique offers a robust way to experimentally probe electromagnetic field coherence.
• This advancement has implications for the characterization of complex electromagnetic sources.