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Two-dimensional Talbot effect of the optical vortices and their spatial evolution
Denis A Ikonnikov1, Sergey A Myslivets1,2, Mikhail N Volochaev1
1Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia, 660036.
Scientific Reports
|November 21, 2020
Summary
This study demonstrates the first experimental observation of the Talbot effect for optical vortices (OVs) and their resulting 3D lattices. Researchers also observed the self-healing property of these OVs, paving the way for new applications.
Area of Science:
- Optics and Photonics
- Condensed Matter Physics
Background:
- Optical vortices (OVs) possess unique phase and intensity profiles.
- Diffraction gratings are fundamental optical elements for manipulating light.
- The Talbot effect describes self-imaging of periodic structures under coherent illumination.
Purpose of the Study:
- To experimentally and theoretically investigate the near-field diffraction of optical vortices (OVs) at a 2D diffraction grating.
- To observe and characterize the Talbot effect and Talbot carpets for OVs.
- To explore the formation and properties of 3D OV lattices.
Main Methods:
- Experimental observation of near-field diffraction patterns.
- Theoretical modeling and simulation of OV behavior.
- Reconstruction of the 3D OV lattice unit cell from experimental data.
Main Results:
- First experimental observation of the Talbot effect for optical vortices in the visible range.
- Obtained 3D lattice structures of beamlet-like optical vortices.
- Demonstrated the self-healing property of optical vortices, restoring their intensity profile.
- Experimental results show good agreement with theoretical calculations.
Conclusions:
- The study successfully demonstrates the formation of 3D OV lattices via Talbot effect on a 2D grating.
- The observed self-healing property of OVs is confirmed experimentally.
- The findings provide a foundation for designing and optimizing 3D OV lattices for diverse applications.
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