Terahertz generation by beamlet superposition
Optics
2019-10-02 v3
Abstract
We analytically show how a superposition of beamlets produces terahertz radiation with greater spatial homogeneity and efficiency compared to tilted-pulse-fronts generated by diffraction gratings. The advantages are particularly notable for large pump bandwiths and beam sizes, alluding to better performance in the presence of cascading effects and higher energy pumping. A theory of terahertz generation using a superposition of beamlets is developed. It is shown how such an arrangement produces a distortion free tilted-pulse-front. Closed form expressions for terahertz spectra and transients in three spatial dimensions are derived. Conditions for obtaining performance parity and bounds for optimal parameters are furnished.
Cite
@article{arxiv.1810.09118,
title = {Terahertz generation by beamlet superposition},
author = {Koustuban Ravi and Benjamin Ofori-Okai and Keith A. Nelson and Franz X. Kärtner},
journal= {arXiv preprint arXiv:1810.09118},
year = {2019}
}