Using bicircular laser pulses to control high-harmonic generation in Weyl semimetals. Nonlinear frequency mixing creates tunable spectral sidebands sensitive to light helicity and polarization, enabling ultrafast probes of electron-hole coherence.

Using bicircular laser pulses to control high-harmonic generation in Weyl semimetals. Nonlinear frequency mixing creates tunable spectral sidebands sensitive to light helicity and polarization, enabling ultrafast probes of electron-hole coherence.