Third harmonic generation in double-pulse laser induced air plasma
| Autor: | Yosef Raichlin, Michael Gaft, L. Nagli |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
business.industry Confocal 02 engineering and technology Plasma 021001 nanoscience & nanotechnology Laser 01 natural sciences Atomic and Molecular Physics and Optics Double pulse Electronic Optical and Magnetic Materials law.invention Intensity (physics) 010309 optics Lens (optics) Optics law 0103 physical sciences Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology business Refractive index Beam (structure) |
| Zdroj: | Optics Communications. 443:63-68 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/j.optcom.2019.03.033 |
| Popis: | We found a fast hydrodynamic process in air double pulse Laser Induced Plasma (LIP) during the first 50 ns of plasma life. This process leads to strong inhomogeneity in the refractive index of air LIP, disturbance in the Gouy phase shift, and an increase in Third Harmonic Generation (THG). The efficiency of THG strongly depends on the confocal parameter of the focusing beam. The decrease in the focus of the pumping lens, despite the increase in the pump intensity, leads to a decrease in TH intensity. This can be attributed to the change from weak to tight focusing conditions in THG. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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