We report on terahertz high-harmonic generation in a Dirac semimetal as a function of the driving-pulse ellipticity and on a theoretical study of the field-driven intraband kinetics of massless Dirac fermions.Very efficient control of third-harmonic yield and polarization state is achieved in electron-doped Cd3As2 thin films at room temperature. The observed tunability is understood as resulting from terahertz-field driven intraband kinetics of the Dirac fermions. Our study paves the way for exploiting nonlinear optical properties of Dirac matter for applications in signal processing and optical communications.
@article{arxiv.2208.02548,
title = {Ellipticity control of terahertz high-harmonic generation in a Dirac semimetal},
author = {Semyon Germanskiy and Renato M. A. Dantas and Sergey Kovalev and Chris Reinhoffer and Evgeny A. Mashkovich and Paul H. M. van Loosdrecht and Yunkun Yang and Faxian Xiu and Piotr Surówka and Roderich Moessner and Takashi Oka and Zhe Wang},
journal= {arXiv preprint arXiv:2208.02548},
year = {2022}
}
Comments
7 pages, 4 figures, supplemental material included