Generalized Fresnel-Floquet equations for driven quantum materials

Floquet metamaterials

“…In a similar context, vibrational modes strongly coupled with light in phonon polaritons have opened various opportunities for Floquet matter: being longerlived than plasmons, phonon polaritons offer an ideal trade-off between field confinement and quality factors, in addition to their high directionality, and associated exotic dispersion relations [7,101]. Recent efforts have successfully demonstrated pumping of phonon modes in SiC for parametric amplification in a pump-probe setting [28] based on Floquet phenomena [102,103]. Along a similar direction, pump-induced switching of the dispersion of surface polaritons has recently been reported [104].…”

Local Fluctuations in Cavity Control of Ferroelectricity

“…Ideally, one would like to think of this as adding a new "control knob" to the toolbox of solid-state physics just like temperature, pressure, external field, and twist-angle, allowing for new explorations of physical systems and device structures [1]. For instance, intense electromagnetic radiation can induce nonequilibrium phases of matter and generate new phase diagrams, with sometimes no counterpart in equilibrium [2][3][4][5][6][7][8][9][10][11][12][13]. However, the nonequilibrium route towards optical control has a number of drawbacks which impede its practical application, chief among them are problems related to heating, optical access, and complicated theoretical modeling.…”

Optical Control of Slow Topological Electrons in Moiré Systems

“…Introduction-Time-periodic fields can drive materials into exotic non-equilibrium phases [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15], with unconventional transport and optical characteristics [16][17][18][19][20][21][22][23] controllable by external parameters. In laser-driven twisted bilayer graphene (TBG) [24][25][26][27][28], a flat-band regime with pronounced electron-electron interaction effects is accessible away from the magic angles [29].…”