# Ellipticity control of terahertz high-harmonic generation in a Dirac semimetal

Source: [Ellipticity control of terahertz high-harmonic generation in a Dirac semimetal](<https://www.sota2.com/research/paper/68fa427a1e209131ce902812>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-25T03:48:05.788Z

Authors: Semyon Germanskiy, Renato M. A. Dantas, Sergey Kovalev, Chris Reinhoffer, Evgeny A. Mashkovich, Paul H. M. van Loosdrecht, Yunkun Yang, Faxian Xiu, Piotr Sur\\'owka, Roderich Moessner, Takashi Oka, Zhe Wang

Published: 2022-08-04T09:41:57.000Z

## Abstract

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 Cd$\_3$As$\_2$ 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.

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/2208.02548>)

[PDF](<https://arxiv.org/pdf/2208.02548.pdf>)