Diffraction of cosine-Gaussian-correlated Schell-model beams

Area of Science:

• Optics and Photonics
• Electromagnetism
• Mathematical Physics

Background:

• Spectral density analysis is crucial for understanding light beam propagation.
• Cosine-Gaussian-correlated Schell-model (CGSM) beams are a significant class of partially coherent beams.
• Aperture diffraction significantly alters beam characteristics.

Purpose of the Study:

• To derive and analyze the spectral density of CGSM beams diffracted by an aperture.
• To investigate the influence of aperture diffraction on CGSM beam propagation.
• To explore the effects of beam parameters on spectral density distributions.

Main Methods:

• Derivation of spectral density expression for CGSM beams.
• Numerical simulations of beam propagation through apertures.
• Comparative analysis of spectral density with and without aperture diffraction.

Main Results:

• CGSM beams exhibit a spectral density dip and dark hollow intensity distribution for large order parameters (n).
• Central intensity increases with the aperture's truncation parameter.
• Spatial coherence and order parameter significantly affect spectral density.

Conclusions:

• Aperture diffraction induces unique spectral density features in CGSM beams.
• The study provides insights into controlling beam profiles for applications.
• Results are potentially applicable to optical particulate manipulation.