A New Type of Two-photon Forward Radiation in Pure Liquids
Chemical Physics
2007-06-19 v1 Optics
Abstract
Unexpected spectral features are observed in the two photon spectrum of the pure water in the forward direction when an 80 femtosecond laser pulse is focused at 10^10Wcm-2 or less. Such intensity is much lower than the breakdown or stimulated threshold of the liquid water. The two broad features are about 2700cm-1 and 5000cm-1 red shifted from the hyper-Rayleigh wavelength, respectively, and they are quadratic with the laser intensity. They do not match the known Raman or hyper-Raman frequencies of water, and they are both centered at a narrow angle in the forward direction. Several other liquids also exhibited similar but molecular specific spectral features.
Keywords
Cite
@article{arxiv.0706.2408,
title = {A New Type of Two-photon Forward Radiation in Pure Liquids},
author = {Hong-tao Bian and Yi Rao and Yan-yan Xu and An-an Liu and Yuan Guo and Hong-fei Wang},
journal= {arXiv preprint arXiv:0706.2408},
year = {2007}
}
Comments
4 pages, 4 figures