Enhancement of terahertz emission by a preformed plasma in liquid water
Abstract
Terahertz (THz) wave generation from liquids under optical excitation has been experimentally confirmed. Here, we report the observation of THz emission enhancement from liquid water with a preformed plasma. Two collinear optical beams with a controlled time delay are focused into a liquid water line. With a plasma created by the first optical pump, the THz emission generated by the second pump is enhanced significantly. By using the same total incident energy compared to the commonly used single-pump excitation, an enhancement over 8 times is observed when the prepump is s-polarized. This observation provides an alternative strategy to boost THz generation from liquids and helps to further understand the laser-liquid interaction process.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 02, 2019
- Source ID
- 10.1063/1.5119812
Entities
People
- Qi Jin
- X.-C. Zhang
- Yiwen E
Organizations
- Air Force Office of Scientific Research
- Army Research Office
- National Science Foundation
- University of Rochester