Polychromatic electric field knots

Ferrer-Garcia, Manuel F.; D’Errico, Alessio; Sit, Alicia; Laroque, Hugo; Karimi, Ebrahim

doi:10.1103/physrevresearch.3.033226

Cited by 15 publications

(9 citation statements)

References 33 publications

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“…Second, skyrmionic polarization textures have been recently described and observed in both optical [27][28][29][30][31][32] and sound [33] waves. Finally, polarization knots were recently analyzed for both optical and sound waves [34][35][36][37]. It is worth mentioning that other types of classical waves (e.g., water waves) can also exhibit similar polarization-related features [6,21,36].…”

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confidence: 99%

Observation of Polarization Singularities and Topological Textures in Sound Waves

et al. 2022

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Polarization singularities and topological polarization structures are generic features of inhomogeneous vector wave fields of any nature. However, their experimental studies mostly remain restricted to optical waves. Here, we report the observation of polarization singularities, topological Möbius-strip structures, and skyrmionic textures in 3D polarization fields of inhomogeneous sound waves. Our experiments are made in the ultrasonic domain using nonparaxial propagating fields generated by space-variant 2D acoustic sources. We also retrieve distributions of the 3D spin density in these fields. Our results open the avenue to investigations and applications of topological features and nontrivial 3D vector properties of structured sound waves.

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confidence: 99%

Observation of Polarization Singularities and Topological Textures in Sound Waves

et al. 2022

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“…Recently, knots formed by three-dimensional polychromatic waves were explored 48 , 49 , where position-dependent knots, defined by the trajectory of the electric field, are generated. It might be interesting, from both fundamental and application points of view, to combine the concepts of position-dependent knots and our nested knots together, which may increase the capacity further.…”

Section: Discussionmentioning

confidence: 99%

High capacity topological coding based on nested vortex knots and links

et al. 2022

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Optical knots and links have attracted great attention because of their exotic topological characteristics. Recent investigations have shown that the information encoding based on optical knots could possess robust features against external perturbations. However, as a superior coding scheme, it is also necessary to achieve a high capacity, which is hard to be fulfilled by existing knot-carriers owing to the limit number of associated topological invariants. Thus, how to realize the knot-based information coding with a high capacity is a key problem to be solved. Here, we create a type of nested vortex knot, and show that it can be used to fulfill the robust information coding with a high capacity assisted by a large number of intrinsic topological invariants. In experiments, we design and fabricate metasurface holograms to generate light fields sustaining different kinds of nested vortex links. Furthermore, we verify the feasibility of the high-capacity coding scheme based on those topological optical knots. Our work opens another way to realize the robust and high-capacity optical coding, which may have useful impacts on the field of information transfer and storage.

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“…The rigid-body-emulated tweezers in toroidal structured light provided extra DoFs for the optical tweezers and achieved 6D optical tweezers. Our method can be extended to novel advanced optical tweezers employing other kinds of complex structured light, such as torus knots [33][34][35],…”

Section: Discussion and Outlookmentioning

confidence: 99%

Six-dimensional structured optical tweezers synthetized by rigid-body emulation

Shen

Zhu

Tai

et al. 2022

Preprint

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Structuring light with more extended degrees of freedom (DoFs) and in higher dimensions is increasingly gaining traction and leading to breakthroughs such as super-resolution imaging, larger-capacity communication, especially ultraprecise optical trapping or tweezers. More DoFs when manipulating an object can access more maneuvers and radically increase maneuvering precision, which is of significance in biology and related microscopic detection. However, manipulating particles beyond the three-dimensional (3D) spatial manipulation by using current all-optical tweezers technology remains difficult. To overcome this limitation, we theoretically and experimentally present six-dimensional (6D) structured optical tweezers based on tailoring structured light emulating rigid-body mechanics. Our method facilitates the evaluation of the methodology of rigid-body mechanics to synthesize six independent DoFs in a structured optical trapping system, akin to six-axis rigid-body manipulation, including surge, sway, heave, roll, pitch, and yaw. In contrast to previous 3D optical tweezers, our 6D structured optical tweezers significantly improved the flexibility of the path design of complex trajectories, thereby laying the foundation for next-generation functional optical manipulation, assembly, and micromechanics.

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Polychromatic electric field knots

Cited by 15 publications

References 33 publications

Observation of Polarization Singularities and Topological Textures in Sound Waves

Observation of Polarization Singularities and Topological Textures in Sound Waves

High capacity topological coding based on nested vortex knots and links

Six-dimensional structured optical tweezers synthetized by rigid-body emulation

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