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3 October 2022 Knots of darkness in linear and nonlinear metasurfaces (Conference Presentation)
Natasha M. Litchinitser, Jiannan Gao, Dmitrii Tsvetkov, Danilo Gomes M. Pires, Ivan Kravchenko
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Proceedings Volume PC12195, Metamaterials, Metadevices, and Metasystems 2022; PC1219512 (2022) https://doi.org/10.1117/12.2637320
Event: SPIE Nanoscience + Engineering, 2022, San Diego, California, United States
Abstract
In this talk we discuss our theoretical and experimental studies of a family of null solutions to Helmholtz equation in 3D free space - optical vortices, or zero lines of complex amplitude in a propagating light field. When multiple light beams overlap in three-dimensional space, their interference produces tangled lines of complete darkness – optical vortices that can form closed loops – links or knots. We design all-dielectric optical metasurfaces – nanostructures enabling unprecedented control over the amplitude, polarization and phase of optical fields, for generation of optical knots, and study their stability, evolution, and third-harmonic generation using knots as a fundamental wave. Knotted electromagnetic fields may find applications in three-dimensional optical manipulations or as potential candidates for new information carriers in classical and quantum communication systems.
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Natasha M. Litchinitser, Jiannan Gao, Dmitrii Tsvetkov, Danilo Gomes M. Pires, and Ivan Kravchenko "Knots of darkness in linear and nonlinear metasurfaces (Conference Presentation)", Proc. SPIE PC12195, Metamaterials, Metadevices, and Metasystems 2022, PC1219512 (3 October 2022); https://doi.org/10.1117/12.2637320
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KEYWORDS
Electromagnetism
Nanostructures
Optical vortices
Optical manipulation
Polarization
Quantum communications
Radio propagation
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