2021/09/30 by Guido Homann, Jayson G. Cosme, Ludwig Mathey · 3 citations
Chemistry · Engineering · Physics and Astronomy · #Condensed matter physics #Cuprate #Dissipative system #Josephson effect #Optics #Parametric oscillator #Phonon #Physics #Physics of Superconductivity and Magnetism #Plasma #Plasma oscillation #Quantum mechanics #Spectroscopy and Laser Applications #Superconductivity #Terahertz radiation #Terahertz technology and applications #cond-mat.supr-con
paper · pdf · open access · doi:10.1103/physrevresearch.4.013181
published in Physical Review Research 4(1) (American Physical Society) · 11 pages, 8 figures
openalex publication_date 2022/03/04 · arxiv created 2022/03/07 · arxiv updated 2022/03/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We demonstrate that parametric driving of suitable collective modes in cuprate superconductors results in a reflectivity R>1 for frequencies in the low terahertz regime. We propose to exploit this effect for the amplification of coherent terahertz radiation in a laser-like fashion. As an example, we consider the optical driving of Josephson plasma oscillations in a monolayer cuprate at a frequency that is blue-detuned from the Higgs frequency. Analogously, terahertz radiation can be amplified in a bilayer cuprate by driving a phonon resonance at a frequency slightly higher than the upper Josephson plasma frequency. We show this by simulating a driven-dissipative U(1) lattice gauge theory on a three-dimensional lattice, encoding a bilayer structure in the model parameters. We find a parametric amplification of terahertz radiation at zero and nonzero temperature.