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Generation of structured light by multilevel orbital angular momentum holograms
Optics Express
|March 17, 2019
Summary
Researchers created structured orbital angular momentum (OAM) light using multilevel holograms. This novel technique controls light
Area of Science:
- Optics and Photonics
- Quantum Information Science
Background:
- Structured light, including light with orbital angular momentum (OAM), has diverse applications.
- Conventional methods often use continuous spiral phase patterns across the entire transverse plane.
Purpose of the Study:
- To develop a new method for creating structured OAM light fields.
- To exploit the relationship between OAM and angle for light structuring.
Main Methods:
- Utilized multilevel OAM holograms to generate structured light.
- Investigated the near-field to far-field transformation of angular phase contours.
- Employed theoretical and experimental approaches.
Main Results:
- Demonstrated that a multilevel angular phase contour in the near-field is sufficient for creating structured OAM light in the far-field.
- Showcased exotic 3D structured light control.
- Visualized the evolution of the Poynting vector in these structured fields.
Conclusions:
- The study highlights the reciprocal nature of angular momentum and angle.
- This technique offers a novel way to control and generate complex light fields.
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