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Cross-spectral densities with helical-Cartesian phases.
Optics Express
|July 19, 2020
Summary
We present a new class of light sources with combined helical and Cartesian phase properties. This enables control over light intensity patterns, useful for generating asymmetric vortex lattices.
Area of Science:
- Physics
- Optics
- Quantum Optics
Background:
- Light sources with phase singularities are crucial for optical manipulation and imaging.
- Controlling the spatial distribution of light intensity is a key challenge in optics.
Purpose of the Study:
- To introduce a novel class of planar, stationary light sources.
- To demonstrate the generation of asymmetric vortex lattices using these sources.
Main Methods:
- Developing sources with cross-spectral densities combining helical and Cartesian phase factors.
- Utilizing a superposition of linear phases with assigned weighing factors for the Cartesian component.
Main Results:
- The helical phase creates a vortex-like intensity profile with a dark core.
- The Cartesian phase leads to asymmetric intensity redistribution along the x- and y-axes.
- Successful generation of asymmetric vortex lattices was demonstrated.
Conclusions:
- The proposed light sources offer a versatile method for controlling optical intensity.
- This work provides a new tool for generating complex light field structures like asymmetric vortex lattices.
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