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Conical diffraction intensity profiles generated using a top-hat input beam.

R T Darcy, D McCloskey, K E Ballantine

|June 13, 2014

Summary

This summary is machine-generated.

Internal conical diffraction of top-hat beams in biaxial materials was studied. A new theoretical model explains the unique intensity profile, differing from Gaussian beams and confirmed by experiments.

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Area of Science:

Optics and Photonics
Condensed Matter Physics

Background:

Internal conical diffraction is a known phenomenon in optics.
Previous studies focused on Gaussian laser beams in biaxial materials.
The behavior of non-Gaussian beams, like top-hat profiles, remained less understood.

Purpose of the Study:

To investigate internal conical diffraction using a top-hat input beam.
To develop a theoretical model for the resulting intensity profile.
To experimentally validate the theoretical predictions.

Main Methods:

Experimental generation and observation of internal conical diffraction patterns.
Theoretical modeling using wave propagation principles.
Comparison of experimental results with model predictions.

Main Results:

Observed distinct intensity profiles for top-hat beams compared to Gaussian beams.
Developed a theoretical model accurately predicting the conically diffracted intensity profile.
Confirmed intricate far-field beam structures experimentally.

Conclusions:

The theoretical model successfully describes the unique conical diffraction of top-hat beams.
Top-hat beams exhibit qualitatively different diffraction patterns than Gaussian beams.
Experimental validation confirms the complex far-field evolution predicted by the model.