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

2024; American Association for the Advancement of Science; Volume: 10; Issue: 11 Linguagem: Inglês

10.1126/sciadv.adi7598

2375-2548

Min-Jae Kim, Sergey Kovalev, Mattia Udina, Rafael Haenel, Gideok Kim, Matteo Puviani, Georg Cristiani, Igor Ilyakov, Thales V. A. G. de Oliveira, Alexey Ponomaryov, Jan‐Christoph Deinert, Г. Логвенов, B. Keimer, Dirk Manske, Lara Benfatto, S. Kaiser,

Superconducting and THz Device Technology

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