450 citations · 1k across the 18 of their papers we have counts for
19 papers
Tensor-driven geometric phase in nonlinear AlGaAs metasurfaces
Giorgio Guercio, Andrea Gerini, Kristina Frizyuk +5
Dielectric metasurfaces provide a unique platform for efficient harmonic generation and optical wavefront manipulation at the nanoscale. While several approaches are available for…
Electro-optical modulation of light polarization in a nonlocal lithium niobate metasurface
Agostino Di Francescantonio, Alessandra Sabatti, Eleni Prountzou +6
We report the experimental realization of a LiNbO3 metasurface for electro-optic modulation of light polarization in the telecommunication band. High-Q quasi-bound states in the co…
Nonlinear Nonlocal Metasurface for Harmonic Generation and Manipulation
Hooman Barati Sedeh, Yuruo Zheng, Jiaren Tan +7
The discovery of second harmonic generation in 1961 marked the birth of nonlinear optics, unlocking a range of applications from frequency conversion to quantum light generation. Y…
Chiral high-harmonic generation in metasurfaces
Piyush Jangid, Maria Antonietta Vincenti, Luca Carletti +3
High-harmonic generation (HHG) provides the only source of attosecond pulses -- currently the shortest accessible time intervals, and it is employed as the only table-top source of…
Efficient GHz electro-optical modulation with a nonlocal lithium niobate metasurface in the linear and nonlinear regime
Agostino Di Francescantonio, Alessandra Sabatti, Helena Weigand +8
Electro-optical modulation is widely employed for optical signal processing and in laser technology. To date, it is efficiently realized in integrated photonic systems as well as i…
Inverse Design of an All-Dielectric Nonlinear Polaritonic Metasurface
Simon Stich, Jewel Mohajan, Domenico de Ceglia +7
Nonlinear metasurfaces offer a new paradigm to realize optical nonlinear devices with new and unparalleled behavior compared to nonlinear crystals, due to the interplay between pho…
Resonant Fully dielectric metasurfaces for ultrafast Terahertz pulse generation
Luke Peters, Davide Rocco, Luana Olivieri +11
Metasurfaces represent a new frontier in materials science paving for unprecedented methods of controlling electromagnetic waves, with a range of applications spanning from sensing…
Enhanced five-photon photoluminescence in subwavelength AlGaAs resonators
Anastasiia Zalogina, Pavel Tonkaev, Aditya Tripathi +5
Multiphoton processes of absorption photoluminescence have enabled a wide range of applications including three-dimensional microfabrication, data storage, and biological imaging.…
Meta-Optics with Lithium Niobate
Anna Fedotova, Luca Carletti, Attilio Zilli +8
The rapid development of metasurfaces - 2D ensembles of engineered nanostructures - is presently fostering a steady drive towards the miniaturization of many optical functionalitie…
High harmonic generation from a subwavelength dielectric resonator
Anastasiia Zalogina, Luca Carletti, Aditya Tripathi +5
Higher-order optical harmonics entered the realm of nanostructured solids being observed recently in optical gratings and metasurfaces with a subwavelength thickness. Structuring m…
Efficient frequency conversion with geometric phase control in optical metasurfaces
Bernhard Reineke Matsudo, Basudeb Sain, Luca Carletti +5
Metasurfaces have appeared as a versatile platform for miniaturized functional nonlinear optics due to their design freedom in tailoring wavefronts. The key factor that limits its…
Near-unity third-harmonic circular dichroism driven by quasi-BIC in asymmetric silicon metasurfaces
Marco Gandolfi, Andrea Tognazzi, Davide Rocco +2
We use numerical simulations to demonstrate third-harmonic generation with near-unity nonlinear circular dichroism (CD) and high conversion efficiency () i…
Tuning the Ultrafast Response of Fano Resonances in Halide Perovskite Nanoparticles
Paolo Franceschini, Luca Carletti, Anatoly P. Pushkarev +12
The full control of the fundamental photophysics of nanosystems at frequencies as high as few THz is key for tunable and ultrafast nano-photonic devices and metamaterials. Here we…
Silicon metasurfaces for third harmonic geometric phase manipulation and multiplexed holography
Bernhard Reineke, Basudeb Sain, Ruizhe Zhao +5
Nonlinear wavefront control is a crucial requirement in realizing nonlinear optical applications with metasurfaces. Numerous aspects of nonlinear frequency conversion and wavefront…
Resonant, broadband and highly efficient optical frequency conversion in semiconductor nanowire gratings at visible and UV wavelengths
M. Scalora, J. Trull, C. Cojocaru +5
Using a hydrodynamic approach we examine bulk- and surface-induced second and third harmonic generation from semiconductor nanowire gratings having a resonant nonlinearity in the a…
Giant nonlinear response at the nanoscale driven by bound states in the continuum
Luca Carletti, Kirill Koshelev, Costantino De Angelis +1
Being motivated by the recent prediction of high- supercavity modes in subwavelength dielectric resonators, we study the second-harmonic generation from isolated subwavelength A…
Evidence for cascaded third harmonic generation in non-centrosymmetric gold nanoantennas
Michele Celebrano, Andrea Locatelli, Lavinia Ghirardini +10
The optimization of nonlinear optical processes at the nanoscale is a crucial step for the development of nanoscale photon sources for quantum-optical networks. The development of…
Monolithic AlGaAs second-harmonic nanoantennas
V. F. Gili, L. Carletti, A. Locatelli +9
We demonstrate monolithic aluminum gallium arsenide (AlGaAs) optical anoantennas. Using a selective oxidation technique, we fabricate such epitaxial semiconductor nanoparticles on…
Stable, highly nonlinear amorphous silicon nanowires with very low nonlinear absorption
Luca Carletti, Christian Grillet, Phillipe Grossec +5
The nonlinear characteristics of hydrogenated amorphous silicon nanowires are experimentally demonstrated. A high nonlinear refractive index, n2=1.19 x 10-17 m2/W, combined with a…