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

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arxiv 2208.02548 v2 pith:6GH3PY2Y submitted 2022-08-04 cond-mat.mtrl-sci physics.optics

Semyon Germanskiy , Renato M. A. Dantas , Sergey Kovalev , Chris Reinhoffer , Evgeny A. Mashkovich , Paul H. M. van Loosdrecht , Yunkun Yang , Faxian Xiu
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Piotr Surówka Roderich Moessner Takashi Oka Zhe Wang
This is my paper · ORCID
classification cond-mat.mtrl-sciphysics.optics
keywords diraccontrolellipticityfermionsgenerationhigh-harmonicintrabandkinetics
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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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