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.

7 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