Enhancing terahertz generation from a two-color plasma using optical parametric amplifier waste light
Year: 2019
Type: article
Abstract: We show experimentally that the terahertz (THz) emission of a plasma, generated in air by a two-color laser pulse (containing a near IR frequency and its second harmonic), can be enhanced by the addition of an 800-nm pulse. We observed enhancements of the THz electric field by a factor of up to 30. This provides a widely accessible means for researchers using an optical parametric amplifier (OPA) to increase their THz yields by simply adding the residual pump beam of the OPA to the plasma generating beam. We investigate the dependence of the THz electric field enhancement factor on the powers of the two-color beam and the 800-nm enhancement beam. Numerical calculations using the well-known photocurrent model are in excellent agreement with the experimental observations.
Source: Applied Physics Letters
DOI: 10.1063/1.5054649
Authors: Shayne A. Sorenson, Clayton D. Moss, Steven K. Kauwe, Jacob D. Bagley, Jeremy A. Johnson
Institution: Brigham Young University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2884519737