Partially coherent fluctuating sources that produce the same optical force as a laser beam

Area of Science:

• Optics and Photonics
• Biophysics
• Laser Physics

Background:

• Wolf and Collett's theory provides a foundation for understanding light-matter interactions.
• Partially coherent light sources are increasingly studied for their unique properties.
• Laser beams are commonly used for optical manipulation but can cause thermal damage.

Purpose of the Study:

• To investigate the optical forces produced by partially coherent Gaussian-Schell model fluctuating sources (GSMS).
• To explore the potential of GSMS for controlling light-matter mechanical interactions in biological samples.
• To compare the forces generated by GSMS with those from fully coherent laser beams.

Main Methods:

• Theoretical derivation based on Wolf and Collett's work.
• Analysis of optical forces generated by GSMS.
• Comparison of GSMS with fully coherent laser beams in terms of optical forces and intensity.

Main Results:

• GSMS produce optical forces identical to fully coherent laser beams.
• GSMS enable control over the magnitude of light-matter mechanical interaction.
• The same photonic force can be achieved with low-intensity GSMS as with high-intensity laser beams, reducing thermal effects.

Conclusions:

• Partially coherent Gaussian-Schell model sources offer an alternative to laser beams for optical manipulation.
• GSMS provide a means to mitigate thermal damage in light-sensitive biological samples.
• This research opens new avenues for precise optical control in biophysics and materials science.