6 papers
Single-pump hybrid nonlinearities in transparent conductors
Wallace Jaffray, Sven Stengel, Alexandra Boltasseva +7
Low-index transparent conducting oxides have attracted significant attention because ultrafast optical excitation in these materials can induce exceptionally large temporal index g…
Second-Harmonic Generation at a Fourth-Order Exceptional Point Degeneracy
Albert Herrero-Parareda, Domenico de Ceglia, Maria Antonietta Vincenti +3
An anomalous flat-band dispersion provided by a degenerate band edge (DBE) of longitudinal optical modes in a double-grating waveguide is used to enhance second-harmonic generation…
Spatio-Temporal Photonic Metalattice
Wallace Jaffray, Sven Stengel, Farhan Ali +9
When coherent light interacts with an ordered lattice whose periodicity is comparable to its wavelength, constructive interference produces a diffraction pattern as in crystallogra…
Dynamic Control of Nonlinear Emission by Exciton-Photon Coupling in WS2 Metasurfaces
Mudassar Nauman, Domenico de Ceglia, Jingshi Yan +6
Transition metal dichalcogenides (TMDCs) have demonstrated significant potential as versatile quantum materials for light absorption and emission. Their unique properties are prima…
Giant Second Harmonic Generation from 3R-MoS Metasurfaces
Yilin Tang, Hao Qin, Domenico de Ceglia +10
Metasurfaces have long served as a cornerstone technique to enhance nonlinear processes, enabling frequency conversion, efficient light manipulation and integrated photonic devices…
Extreme electrodynamics in time-varying media
M. Scalora, M. A. Vincenti, D. de Ceglia +7
Abrupt time variations of the properties of optical materials have been at the center of intense research efforts in recent years, with the prospect of enabling extreme wave transf…