Recent studies of the electromagnetic response of high-T c superconductors using terahertz,
infrared, and optical spectroscopies are reviewed. In combination these experimental …

Nonlinear optical excitation of infrared active lattice vibrations has been shown to melt
magnetic or orbital orders and to transform insulators into metals. In cuprates, this technique …

Optical conductivity spectra of conducting oxides, cuprates, including high-Tc
superconductors, nickelates, manganites, doped titanates, barium–lead–bismuth oxides …

Quantum materials are amenable to nonequilibrium manipulation with light, enabling
modification and control of macroscopic properties. Light-based augmentation of …

Layered superconductors like high-T c cuprates display out-of-plane plasma oscillations
between layers sustained by the weak Josephson coupling among the superconducting …

We review the optical physics of Josephson plasmons in cuprate superconductors. These
coherent charge modes arise from tunneling of the superfluid between superconducting …

In the quest for dynamic multimodal probing of a material's structure and functionality, it is
critical to be able to quantify the chemical state on the atomic-/nanoscale using element …

The spectra of the far-infrared c-axis conductivity of underdoped YBCO crystals exhibit
dramatic changes of some of the phonon peaks when going from the normal to the …

We propose to induce a time-crystalline state in a high-T c superconductor, by optically
driving a sum resonance of the Higgs mode and a Josephson plasma mode. The generic …

A detailed calculation is presented of the dielectric function in superconductors consisting of
two Josephson coupled superconducting layers per unit cell, taking into account the effect of …