Inversion of the axial projection of the spin angular momentum in the region of the backward energy flow in sharp focus
| Autor: | Sergey S. Stafeev, Anton G. Nalimov, Victor V. Kotlyar |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
business.industry Axial projection Inversion (meteorology) 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics Computational physics 010309 optics Optical axis Optics Energy flow 0103 physical sciences Vortex beam 0210 nano-technology business Optical vortex Circular polarization |
| Zdroj: | Optics express. 28(23) |
| ISSN: | 1094-4087 |
| Popis: | We show theoretically and numerically that when strongly focusing a circularly polarized optical vortex, the longitudinal component of its spin angular momentum undergoes inversion. A left-handed circularly polarized input beam is found to convert in the focus and near the optical axis to a right-handed circularly polarized beam. Thanks to this effect taking place near the strong focus, where a reverse energy flow is known to occur, the spin angular momentum inversion discovered can be utilized to detect a reverse energy flow. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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