AI Article Synopsis
- - The study observes two distinct focusing points in a ZnO single crystal via green two-photon luminescence when a converging femtosecond laser beam is applied.
- - The initial focusing point results primarily from a self-focusing effect, whereas the second point arises from self-refocusing.
- - Results correlate with predictions made by Chin and colleagues, providing novel evidence for self-focusing and refocusing in femtosecond laser propagation through nonlinear media.
Article Abstract
By "seeing" the green two-photon luminescence, two separate focusing points are observed on the propagation axis of a converging femtosecond laser beam in a ZnO single crystal rod. It is found that the self-focusing effect makes a significant contribution to the formation of the first focusing point, while the second focusing point is caused by self-refocusing. The position of the first focusing point is in good agreement with the value predicted by a model developed by Chin and his co-workers. These experimental findings could be the unprecedented evidence for the self-focusing and refocusing effect of the femtosecond laser filament propagation in nonlinear media.
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| http://dx.doi.org/10.1016/j.scib.2018.10.004 | DOI Listing |
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