Inverted Gabor holography principle for tailoring arbitrary shaped three-dimensional beams

Area of Science:

• Optics and Photonics
• Wavefront Engineering

Background:

• Traditional light modulation techniques offer limited control over light intensity and phase.
• Existing methods restrict light shaping to specific spatial regions, parametric curves, or quadratic deflections (e.g., Airy beams).

Purpose of the Study:

• To introduce a generalized method for classical light wavefront shaping.
• To achieve arbitrary intensity and phase redistribution, including controlled intensity "switching-off".

Main Methods:

• Representing a desired 3D light path as a sequence of point-like absorbers.
• Simulating the in-line hologram of this object set.
• Inverting the hologram contrast to create a diffractor that reconstructs the light path.

Main Results:

• Demonstrated the ability to create arbitrary three-dimensional light intensity paths.
• Showcased intensity and phase redistribution into user-defined profiles.
• Validated the method with both simulated and experimental results.

Conclusions:

• The novel wavefront shaping method offers unprecedented control over light intensity.
• The technique enables the creation of complex, arbitrary 3D light trajectories.
• Successful simulation and experimental validation highlight the method's potential.