Collisional absorption of the optical vortex beam in plasma
| Autor: | K. Hajisharifi, Davod Nobahar, Hassan Mehdian |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Electromagnetic wave equation Bremsstrahlung Plasma 01 natural sciences Atomic and Molecular Physics and Optics 010305 fluids & plasmas Electronic Optical and Magnetic Materials Computational physics Vortex Dispersion relation 0103 physical sciences Electrical and Electronic Engineering 010306 general physics Absorption (electromagnetic radiation) Optical vortex Beam (structure) |
| Zdroj: | Optics & Laser Technology. 117:165-168 |
| ISSN: | 0030-3992 |
| Popis: | In the present paper, the inverse bremsstrahlung absorption of vortex laser beam (VLB) propagating in a collisional plasma is investigated. For this purpose, the Maxwell and the plasma hydrodynamic equations are employed to obtain the electromagnetic wave equation. Solving this equation by utilizing the eigen mode method, the dispersion relation and the absorption coefficient of VLB are obtained, and the effect of angular mode number on the absorption of VLBs is also illustrated by numerical calculations. It is shown that the absorption of twisted waves decreases significantly in homogeneous bounded plasmas compared to the waves with symmetric phase structure and, as a result, VLBs exhibit better propagation behavior than typical Gaussian beams. The present results are expected to be useful to the development of advanced particle accelerators and improvement of long-range propagation in remote sensing. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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