Terahertz amplifiers based on gain reflectivity in cuprate superconductors

Guido Homann; Jayson G. Cosme; Ludwig Mathey

doi:10.1103/PhysRevResearch.4.013181

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Terahertz amplifiers based on gain reflectivity in cuprate superconductors

Guido Homann, Jayson G. Cosme, Ludwig Mathey

DOI 10.1103/PhysRevResearch.4.013181 · Physical Review Research

T1

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Abstract

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 laserlike 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.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown