Strong spin–orbit interaction of photonic skyrmions at the general optical interface
| Autor: | Luping Du, Peng Shi, Xiaocong Yuan |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Interface (Java)
QC1-999 spin–orbit interaction Physics::Optics 02 engineering and technology 01 natural sciences Nanomaterials 0103 physical sciences Electrical and Electronic Engineering 010306 general physics Polarization (electrochemistry) spin texture permittivity and permeability Physics polarization Condensed matter physics business.industry Skyrmion Spin–orbit interaction 021001 nanoscience & nanotechnology spin-dependent force Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Photonics 0210 nano-technology business Biotechnology |
| Zdroj: | Nanophotonics, Vol 9, Iss 15, Pp 4619-4628 (2020) |
| ISSN: | 2192-8614 2192-8606 |
| Popis: | Photonic skyrmions have applications in many areas, including the vectorial and chiral optics, optical manipulation, deep-subwavelength imaging and nanometrology. Much effort has been focused on the experimental characterization of photonic skyrmions. Here, we give an insight into the spin and orbital features of photonic skyrmions constructed by the p-polarized and s-polarized surface waves at an interface with various electric and magnetic properties by analyzing the continuity of chirality, energy flow and momentum densities through the electric and magnetic interface. The continuity of chirality density indicates that the photonic skyrmion has a property of the optical transverse spin. Most importantly, the continuity of energy flow and momentum densities results in four spin–orbit interaction quantities, which indicate the gradient of electric polarizability or permeability governs the spin–orbit interaction of photonic skyrmions and leads to the discontinuity and even the reversal of spin orientation through the optical interface. Our investigations on the spin–orbit properties of photonic skyrmions, which can give rise to the spin-dependent force and topological unidirectional transportation, is thorough and can be extended to other classical wave, such as acoustic and fluid waves. The findings help in understanding the spin–orbit feature of photonic topological texture and in constructing further optical manipulation, sensing, quantum and topological techniques. |
| Databáze: | OpenAIRE |
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