Terahertz wave emission from a liquid water film under the excitation of asymmetric optical fields
Abstract
Liquid water excited by intense two-color laser pulses radiates electromagnetic waves at terahertz frequencies. Compared with one-color excitation, two-orders of magnitude enhanced terahertz energy are observed by using asymmetric optical excitation with the same total excitation pulse energy and focusing geometry. Modulation of the terahertz field is achieved via the coherent control approach. We find that modulated and unmodulated terahertz energies have, respectively, quadratic and linear dependence on the laser pulse energy. This work, as part of terahertz aqueous photonics, paves an alternative way of studying laser-liquid interactions and developing intense terahertz sources.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 24, 2018
- Source ID
- 10.1063/1.5064644
Entities
People
- Jianming Dai
- Qi Jin
- Xi-Cheng Zhang
- Yiwen E
Organizations
- Air Force Office of Scientific Research
- Army Research Office
- Capital Normal University
- National Natural Science Foundation of China
- Tianjin University
- University of Rochester