Propagation of structured light through tissue-mimicking phantoms

Area of Science:

• Biomedical optics
• Photonics
• Tissue optics

Background:

• Optical interrogation of tissues is crucial for biomedical applications.
• Light scattering in biological tissues limits resolution and accuracy in subsurface imaging.
• Structured light, featuring optical angular momentum or complex polarization, exhibits distinct propagation characteristics in scattering media compared to conventional light.

Purpose of the Study:

• To investigate the behavior of structured light when scattered by tissue-mimicking phantoms.
• To analyze the impact of varying optical properties (scattering, absorption, length) on scattered structured light.
• To evaluate the trade-offs between structured light advantages and mode broadening effects.

Main Methods:

• Experimental study using tissue-mimicking phantoms with controlled optical properties.
• Analysis of spatial profiles of scattered structured light.
• Characterization of polarization profiles of scattered light modes.

Main Results:

• Structured light demonstrates altered propagation through scattering media.
• Scattering effects on spatial and polarization profiles were quantified as a function of phantom optical parameters.
• A non-trivial trade-off was observed between the benefits of structured light and increased mode broadening.

Conclusions:

• Structured light offers potential for enhanced optical interrogation of tissues.
• Understanding mode broadening is critical for optimizing structured light applications in scattering environments.
• Further research is warranted to leverage structured light for improved biomedical imaging resolution and accuracy.