557 citations · 1.7k across the 22 of their papers we have counts for
24 papers
Nanoporous Copper Films as Platform for UV-SERS: Sensitivity and Ability to Perform Chiral Discrimination
Huaizhou Jin, Anastasiia Sapunova, Yanqiu Zou +8
Surface enhanced Raman spectroscopy (SERS) in the ultraviolet (UV) region offers important advantages for biomolecular detection, including resonance enhancement and reduced fluore…
Mie Optical Computing
Vsevolod Kleshchenko, Vladimir Igoshin, Costantino De Angelis +1
Optical computing is emerging as a promising paradigm for next-generation information processing. Diffractive optical processors rely on spatially distributed trainable degrees of…
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…
Nonlinear virtual lens for programmable and multispectral infrared upconversion imaging
Ze Zheng, Olga Sergaeva, Davide Rocco +5
Conventional infrared (IR) imaging techniques depend on IR cameras based on narrow-bandgap semiconductors, which offer limited spectral bandwidth, coupled with a separate lens. Rec…
Near-infrared polarimetric imaging with nonlinear flat-optics
Evgenii Menshikov, Marco A. López Sánchez, Paolo Franceschini +4
A compact and broadband polarimetric imaging platform is presented, based on second-harmonic generation (SHG) in nonlinear flat-optics. The system employs periodic all-dielectric A…
Light structuring via nonlinear total angular momentum addition with flat optics
Evgenii Menshikov, Paolo Franceschini, Kristina Frizyuk +7
Shaping the structure of light with flat optical devices has driven significant advancements in our fundamental understanding of light and light-matter interactions, and enabled a…
Excitation of surface plasmon-polaritons through optically-induced ultrafast transient gratings
Olesia Pashina, Albert Seredin, Giulia Crotti +4
Ultrafast excitation of non-equilibrium carriers under intense pulses offer unique opportunities for controlling optical properties of semiconductor materials. In this work, we pro…
Copper-based disordered plasmonic system with dense nanoisland morphology
Tlek Tapani, Roman Krahne, Vincenzo Caligiuri +14
Dry synthesis is a highly versatile method for the fabrication of nanoporous metal films, since it enables easy and reproducible deposition of single or multi-layer(s) of nanostruc…
Nonlinear Analog Processing with Anisotropic Nonlinear Films
Michele Cotrufo, Domenico de Ceglia, Hyunseung Jung +4
Digital signal processing is the cornerstone of several modern-day technologies, yet in multiple applications it faces critical bottlenecks related to memory and speed constraints.…
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…
All-optical free-space routing of upconverted light by metasurfaces via nonlinear interferometry
Agostino Di Francescantonio, Attilio Zilli, Davide Rocco +9
All-optical modulation yields the promise of high-speed information processing. In this frame, metasurfaces are rapidly gaining traction as ultrathin multifunctional platforms for…
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…
Third-harmonic light polarization control in magnetically-resonant silicon metasurfaces
Andrea Tognazzi, Kirill I. Okhlopkov, Attilio Zilli +9
Nonlinear metasurfaces have become prominent tools for controlling and engineering light at the nanoscale. Usually, the polarization of the total generated third harmonic is studie…
Infrared up-conversion imaging in nonlinear metasurfaces
Rocio Camacho-Morales, Davide Rocco, Lei Xu +15
Infrared imaging is a crucial technique in a multitude of applications, including night vision, autonomous vehicles navigation, optical tomography, and food quality control. Conven…
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…
Harmonic Generation from Metal-Oxide and Metal-Metal Boundaries
M. Scalora, M. A. Vincenti, D. de Ceglia +7
We explore the outcomes of detailed microscopic models by calculating second- and third-harmonic generation from thin film surfaces with discontinuous free-electron densities. Thes…
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…
Surface Plasmon Excitation of Second Harmonic light: Emission and Absorption
Maria A. Vincenti, Domenico de Ceglia, Costantino De Angelis +1
We aim to clarify the role that absorption plays in nonlinear optical processes in a variety of metallic nanostructures and show how it relates to emission and conversion efficienc…
Mode-matching in multiresonant plasmonic nanoantennas for enhanced second harmonic generation
Michele Celebrano, Xiaofei Wu, Milena Baselli +10
Boosting nonlinear frequency conversion in extremely confined volumes remains a key challenge in nano-optics, nanomedicine, photocatalysis, and background-free biosensing. To this…
Velocity-locked solitary waves in quadratic media
Fabio Baronio, Matteo Conforti, Costantino De Angelis +3
We demonstrate experimentally the existence of three-wave resonant interaction solitary triplets in quadratic media. Stable velocity-locked bright-dark-bright spatial solitary trip…
Nonlinear envelope equation for broadband optical pulses in quadratic media
Matteo Conforti, Fabio Baronio, Costantino De Angelis
We derive a nonlinear envelope equation to describe the propagation of broadband optical pulses in second order nonlinear materials. The equation is first order in the propagation…
Subwavelength Diffraction Management
Matteo Conforti, Massimiliano Guasoni, Costantino De Angelis
We study light propagation in nanoscale periodic structures composed of dielectric and metal in the visible range. We demonstrate that diffraction can be tailored both in magnitude…