Observation of strong terahertz field-induced second harmonic generation in plasma filaments
Abstract
We report the observation of terahertz field-induced second harmonic (TFISH) generation produced by directly mixing an optical probe beam onto femtosecond plasma filaments. The produced TFISH signal is spatially separated from the laser-induced supercontinuum by impinging on the plasma at a noncollinear angle. The conversion efficiency of the fundamental probe beam to its second harmonic (SH) beam is greater than 0.02%, which represents a record in optical probe to TFISH conversion efficiency that is nearly five orders of magnitude larger than previous experiments. We also present the terahertz (THz) spectral buildup of the source along the plasma filament and retrieve coherent terahertz signal measurements. This method of analysis has the potential to provide local electric field strength measurements inside of the filament.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 01, 2022
- Source ID
- 10.1364/ol.477508
Entities
People
- Kareem J. Garriga Francis
- Mervin Lim Pac Chong
- X.-C. Zhang
- Yiwen E
Organizations
- Air Force Office of Scientific Research
- National Science Foundation
- University of Rochester