Abstract
Terahertz generation from liquid, in particular water, was long considered impossible, because of strong absorption. While terahertz radiation from liquid water was finally observed in 2017, the mechanism has remained unclear, and the efficiency low. Here experiments show that when a column of flowing water is used, the efficiency can be enhanced by three orders of magnitude---as high as for a typical two-color air plasma source, yet using a single-color laser pump here. The authors explain the mechanism with a model of current induced by laser ponderomotive force, which is supported by particle-in-cell simulations.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
