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

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.

arXiv comment7 pages, 4 figures, supplemental material included

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Cited by in corpus (10)

• Terahertz Polarization Conversion from Optical Dichroism in a Topological Dirac Semimetal
• High-order nonlinear terahertz probing of the two-band superconductor MgB${}_2$: Third- and fifth-order harmonic generation
• High-harmonic generation in semi-Dirac and Weyl semimetals with broken time-reversal symmetry: Exploring merging of Weyl nodes
• Observation of terahertz second harmonic generation from Dirac surface states in the topological insulator Bi${}_2$Se${}_3$
• Determination of spin-orbit interaction in semiconductor nanostructures via non-linear transport
• Ultrafast dynamics of optically excited charge carriers in the room-temperature antiferromagnetic semiconductor $\alpha$-MnTe
• Population inversion and ultrafast terahertz nonlinearity of transient Dirac fermions in Cd${}_3$As${}_2$
• Strong terahertz third-harmonic generation by kinetic heavy quasiparticles in CaRuO${}_3$
• Terahertz third-harmonic generation of lightwave driven Weyl fermions far from equilibrium
• High-purity valley-polarized currents induced by bichromatic optical fields in two-dimensional materials