188 citations · 972 across the 25 of their papers we have counts for
26 papers
Low-power threshold optical bistability enabled by hydrodynamic Kerr nonlinearity of free-carriers in heavily doped semiconductors
Huatian Hu, Gonzalo Álvarez-Pérez, Tadele Orbula Otomalo +1
We demonstrate nanoscale optical bistability at an exceptionally low power threshold of 1 mW by leveraging Kerr-type hydrodynamic nonlinearities due to the heavily doped semiconduc…
Origin of optical nonlinearity in plasmonic semiconductor nanostructures
Andrea Rossetti, Huatian Hu, Tommaso Venanzi +15
The development of nanoscale nonlinear elements in photonic integrated circuits is hindered by the physical limits to the nonlinear optical response of dielectrics, which requires…
Impact of surface charge depletion on the free electron nonlinear response of heavily doped semiconductors
Federico De Luca, Cristian Ciracì
We propose surface modulation of the equilibrium charge density as a technique to control and enhance, via an external static potential, the free electron nonlinear response of hea…
Nanogap-Enhanced Infrared Spectroscopy with Template-Stripped Wafer-Scale Arrays of Buried Plasmonic Cavities
Xiaoshu Chen, Cristian Ciracì, David R. Smith +1
We have combined atomic layer lithography and template stripping to produce a new class of substrates for surface-enhanced infrared absorption (SEIRA) spectroscopy. Our structure c…
Second-harmonic generation from singular metasurfaces
Fan Yang, Cristian Ciracì
We present a theoretical study of second-harmonic generation from a singular metasurface. The singular metasurfaces strongly interact with the incident light, where the large field…
Second-harmonic generation in plasmonic waveguides with nonlocal response and electron spill-out
Ahsan Noor, Muhammad Khalid, Federico De Luca +4
Plasmonic waveguides provide an integrated platform to develop efficient nanoscale ultrafast photonic devices. Theoretical models that describe nonlinear optical phenomena in plasm…
Fluorescence quenching in plasmonic dimers due to electron tunneling
Henrikh M. Baghramyan, Cristian Ciracì
Plasmonic nanoparticles provide an ideal environment for the enhancement of fluorescent emission. On the one hand, they locally amplify the electromagnetic fields, increasing the e…
Influence of the electron spill-out and nonlocality on gap-plasmons in the limit of vanishing gaps
M. Khalid, O. Morandi, E. Mallet +4
We study the effect of electron spill-out and of nonlocality on the propagation of light inside a gap between two semi-infinite metallic regions. We compare the predictions of a lo…
Free electron nonlinearities in heavily doped semiconductors plasmonics
Federico De Luca, Michele Ortolani, Cristian Ciracì
Heavily doped semiconductors have emerged as tunable low-loss plasmonic materials at mid-infrared frequencies. In this article we investigate nonlinear optical phenomena associated…
Mode-matching enhancement of second-harmonic generation with plasmonic nanopatch antennas
Ahsan Noor, Anoop R. Damodaran, In-Ho Lee +3
Plasmonic enhancement of nonlinear optical processes confront severe limitations arising from the strong dispersion of metal susceptibilities and small interaction volumes that ham…
Laplacian-Level Quantum Hydrodynamic Theory for Plasmonics
Henrikh M. Baghramyan, Fabio Della Sala, Cristian Ciracì
An accurate description of the optical response of subwavelength metallic particles and nanogap structures is a key problem of plasmonics. Quantum hydrodynamic theory (QHT) has eme…
A nested hybridizable discontinuous Galerkin method for computing second-harmonic generation in three-dimensional metallic nanostructures
Ferran Vidal-Codina, Ngoc-Cuong Nguyen, Cristian Ciraci +2
In this paper, we develop a nested hybridizable discontinuous Galerkin (HDG) method to numerically solve the Maxwell's equations coupled with the hydrodynamic model for the conduct…
Enhancing second-harmonic generation with electron spill-out at metallic surfaces
Muhammad Khalid, Cristian Ciracì
Second-order nonlinear optical processes do not manifest in the bulk of centrosymmetric materials, but may occur in the angstroms-thick layer at surfaces. At such length-scales, qu…
Impact of surface roughness in nanogap plasmonic systems
Cristian Ciracì, Ferran Vidal-Codina, Daehan Yoo +3
Recent results have shown unprecedented control over separation distances between two metallic elements hundreds of nanometers in size, underlying the effects of free-electron nonl…
Influence of spatial dispersion on surface plasmons, nanoparticles and grating couplers
Armel Pitelet, Emmanuel Centeno, Antoine Moreau +5
Recent experiments have shown that spatial dispersion may have a conspicuous impact on the response of plasmonic structures. This suggests that in some cases the Drude model should…
Nanowire-Intensified MEF in Hybrid Polymer-Plasmonic Electrospun Filaments
Andrea Camposeo, Radoslaw Jurga, Maria Moffa +5
Hybrid polymer-plasmonic nanostructures might combine high enhancement of localized fields from metal nanoparticles with light confinement and long-range transport in subwavelength…
Current-dependent exchange-correlation potential for non-local absorption in quantum hydrodynamic theory
Cristian Ciracì
The quantum hydrodynamic theory is a promising method for describing microscopic details of macroscopic systems. The hydrodynamic equation can be directly obtained from a single pa…
Enhancement of radiative processes in nanofibers with embedded plasmonic nanoparticles
Radoslaw Jurga, Fabio Della Sala, Dario Pisignano +1
Efficient manipulation and long distance transport of single-photons is a key component in nanoscale quantum optics. In this letter, we study the emission properties of an individu…
Quantum Hydrodynamic Theory for Plasmonics: Impact of the Electron Density Tail
Cristian Ciracì, Fabio Della Sala
Multiscale plasmonic systems e.g. extended metallic nanostructures with sub-nanometer inter-distances) play a key role in the development of next-generation nano-photonic devices.…
Second harmonic generation with plasmonic metasurfaces: direct comparison of electric and magnetic resonances
Rohith Chandrasekar, Naresh K. Emani, Alexei Lagutchev +4
Plasmonic resonances in metallic nanostructures have been shown to drastically enhance local electromagnetic fields, and thereby increase the efficiency of nonlinear optical phenom…
Influence of spatial dispersion in metals on the optical response of deeply subwavelength slit arrays
Mathieu Dechaux, Paul-Henri Tichit, Cristian Ciracì +5
In the framework of the hydrodynamic model describing the response of electrons in a metal, we show that arrays of very narrow and shallow metallic slits have an optical response t…
Nonlocality in metallo-dielectric multilayers: numerical tools and physical analysis
Jessica Benedicto, Rémi Pollès, Cristian Ciracì +3
We provide theoretical and numerical tools to quantitatively study the impact of nonlocality arising from free electrons in metals on the optical properties of metallo-dielectric m…
Dramatic Enhancement of Third-Harmonic Generation in Plasmonic Nanostructures via Nonlocal Effects
Cristian Ciracì, Michael Scalora, David R. Smith
Classical nonlocality in conducting nanostructures has been shown to dramatically alter the linear optical response, by placing a fundamental limit on the maximum field enhancement…
The impact of nonlocal response on metallo-dielectric multilayers and optical patch antennas
Antoine Moreau, Cristian Ciracì, David R. Smith
We analyze the impact of nonlocality on the waveguide modes of metallo-dielectric multilayers and optical patch antennas, the latter formed from metal strips closely spaced above a…