Abstract
We observe experimentally and explain theoretically second- and third-harmonic generation from a cell containing xenon gas using a tightly focused laser beam with intensities of up to 4× W/. Both processes are forbidden according to standard lowest-order theories.
- Received 28 August 1989
DOI:https://doi.org/10.1103/PhysRevA.41.3822
©1990 American Physical Society