Deep-penetration fluorescence imaging through dense yeast cells suspensions using Airy beams

Area of Science:

• Optics and Photonics
• Biomedical Imaging
• Microscopy

Background:

• Imaging through turbid media is challenging due to light scattering.
• Confocal microscopy suffers from reduced resolution and signal in scattering environments.
• Non-diffractive beams offer potential for deep tissue imaging.

Purpose of the Study:

• To introduce a new method for imaging fluorescent objects in turbid media using Airy beam scanning.
• To demonstrate the advantages of Airy beam scanning over conventional techniques like confocal imaging.
• To showcase the capability of depth information retrieval without additional sectioning.

Main Methods:

• Utilizing the non-diffractive property of Airy beams for light penetration.
• Employing Airy beam scanning for fluorescence imaging.
• Experimental validation using fluorescent microbeads in a yeast cell suspension.

Main Results:

• Achieved higher resolution and signal-to-noise ratio compared to confocal imaging.
• Successfully imaged 1 μm fluorescent beads at a depth of 90 μm in a scattering medium (51 cm^-1).
• Demonstrated intrinsic depth localization capability of the technique.

Conclusions:

• Airy beam scanning is a promising technique for high-resolution fluorescence imaging in scattering biological tissues.
• The method overcomes limitations of traditional imaging techniques in turbid environments.
• This approach offers a new tool for in-situ depth-resolved imaging of fluorescent targets.