Xu Yang

TL;DR: This work presents the simulation, implementation, and measurement of a broadband PIT metamaterial functioning in the terahertz regime, and finds a broad transparency window across a frequency range greater than 0.40 THz is obtained.

TL;DR: In this paper, a subcycle dynamical symmetry breaking achieved with nonlinear oscillating terahertz photocurrents is proposed to drive moving condensate states via subcycle dynamic symmetry breaking, which can manifest via high harmonic modes beyond those allowed by equilibrium symmetries.

TL;DR: Luo et al. as discussed by the authors used the mid-infrared and terahertz photoexcitation of exclusive intraband transitions to enable ultrafast manipulation of surface THz conductivity in Bi2Se3.

TL;DR: A long-lived gapless quantum phase of prethermalized quasiparticles (QPs) after a single-cycle terahertz (THz) quench of a Nb3Sn SC gap is revealed and switched to this metastable ‘quantum QP fluid’ signals non-thermalQuench of coupled SC and charge-density-wave (CDW)-like orders and hints quantum control beneath the SC.

TL;DR: Terahertz light-induced second harmonic generation, in superconductors with inversion symmetry that forbid even-order nonlinearities, is reported, using quantum kinetic modeling of the interplay between strong THz-lightwave nonlinearity and pulse propagation.