Tracing the dynamics of superconducting order via transient terahertz third-harmonic generation.

ABSTRACT: Ultrafast optical control of quantum systems is an emerging field of physics. In particular, the possibility of light-driven superconductivity has attracted much of attention. To identify nonequilibrium superconductivity, it is necessary to measure fingerprints of superconductivity on ultrafast timescales. Recently, nonlinear THz third-harmonic generation (THG) was shown to directly probe the collective degrees of freedoms of the superconducting condensate, including the Higgs mode. Here, we extend this idea to light-driven nonequilibrium states in superconducting La_2-xSr_xCuO₄, establishing an optical pump-THz-THG drive protocol to access the transient superconducting order-parameter quench and recovering on few-picosecond timescales. We show

SUBMITTER: Kim MJ 

PROVIDER: S-EPMC10942118 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature