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Autofocusing field constructed by ring-arrayed Pearcey Gaussian chirp beams.
Optics Express
|December 16, 2022
Summary
We introduce ring-arrayed Pearcey Gaussian chirp beams (RAPGCBs) with controllable autofocusing properties. These beams, especially those with optical vortices, show promise for particle trapping and biomedical applications.
Area of Science:
- Optics and Photonics
- Laser Physics
- Beam Propagation
Background:
- Pearcey beams are known for their autofocusing properties.
- Controlling beam propagation and intensity profiles is crucial for advanced optical applications.
- Optical vortices (OVs) introduce unique phase structures to light beams.
Purpose of the Study:
- To propose and demonstrate novel ring-arrayed Pearcey Gaussian chirp beams (RAPGCBs).
- To investigate the propagation characteristics and autofocusing abilities of RAPGCBs.
- To explore the influence of optical vortices on RAPGCB properties.
Main Methods:
- Theoretical derivation of the general analytical formula for RAPGCB propagation.
- Numerical simulations to analyze beam profiles and autofocusing.
- Experimental verification of simulated results.
- Integration of optical vortices into RAPGCBs.
Main Results:
- RAPGCBs exhibit polygonal beam profiles dependent on the number of synthesized beams (n).
- Autofocusing properties are tunable via the chirp factor (β).
- Single or paired positive OVs create autofocusing hollow fields.
- Annihilation of opposite OVs enhances autofocusing capabilities.
Conclusions:
- RAPGCBs offer controllable autofocusing and tunable beam shapes.
- The interaction of OVs with RAPGCBs leads to unique intensity distributions and enhanced autofocusing.
- These beams hold potential for applications in particle trapping and biomedical imaging.
