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Transmission of classically entangled beams through mouse brain tissue
Sandra Mamani1, Lingyan Shi1,2, Tahmid Ahmed3
1Institute for Ultrafast Spectroscopy and Lasers, Department of Physics, The City College of the City University of New York, New York, New York.
Journal of Biophotonics
|July 21, 2018
Summary
Mouse brain tissue transmits light differently based on its structure. Structured light, like vortex beams, shows unique transmission properties due to chiroptical effects in the chiral brain media.
Area of Science:
- Biophotonics
- Neuroscience
- Optical Physics
Background:
- Mouse brain tissue exhibits complex optical properties.
- Light scattering and absorption affect imaging depth and resolution.
- Understanding light-tissue interaction is crucial for neuroimaging techniques.
Purpose of the Study:
- Investigate light transmission of Laguerre-Gaussian vector vortex beams in mouse brain tissue.
- Analyze transmittance in ballistic and diffusive regions.
- Explore the influence of polarization and orbital angular momentum (OAM) on light propagation.
Main Methods:
- Utilized Laguerre-Gaussian vector vortex beams with varying polarization states and OAM.
- Measured light transmittance in different regions of mouse brain tissue.
- Compared transmittance for structured light versus linear polarization.
Main Results:
- Observed significant transmission changes with structured light, attributed to chiroptical phenomena.
- Classically entangled beams demonstrated higher and more constant transmittance across OAM modes compared to linear modes.
- Circularly polarized beams showed increased transmittance with topological charge OAM, suggesting a chiroptical effect.
Conclusions:
- Chiroptical phenomena in chiral brain media significantly influence light transmission.
- Vector vortex beams, particularly circularly polarized ones, offer potential advantages for neuroimaging due to their interaction with brain tissue.
- The handedness of light and the chirality of the medium play a critical role in light propagation through brain tissue.
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