239 citations · 669 across the 22 of their papers we have counts for
23 papers
Plasmonic Electro-Optic Modulators based on Epsilon-Near-Zero Materials: Comparing the Classical Drift-Diffusion and Schrödinger-Poisson Coupling Models
Masoud Shabaninezhad, Hamid Mehrvar, Eric Bernier +2
We present the design, modeling, and optimization of high-performance plasmonic electro-optic modulators leveraging voltage-gated carrier density in indium tin oxide (ITO) where th…
Electrically tunable plasmonic metasurface as a matrix of nanoantennas
Luis Angel Mayoral-Astorga, Masoud Shabaninezhad, Howard Northfield +5
We report the fabrication and characterization of a plasmonic metasurface comprising electrically contacted sub-wavelength gold dipole nanoantennas, conformally coated by a thin ha…
A Finite-Difference Time-Domain approach for dispersive magnetic media
Jasmin Graf, Joshua Baxter, Sanchar Sharma +2
We extend the Finite-Difference Time-Domain method to treat dispersive magnetic media by incorporating magneto-optical effects through a frequency-dependent permittivity tensor. Fo…
Mechanism of laser induced self-organized void array formation in Polydimethylsiloxane (PDMS)
N. Naseri, A. Alshehri, L. Ramunno +1
This study investigated the formation of multi-voids in polydimethylsiloxane (PDMS) using a multi-pulse irradiation method and explored the impact of laser energy, number of pulses…
Improving On-Demand Single Photon Source Coherence and Indistinguishability Through a Time-Delayed Coherent Feedback
Gavin Crowder, Lora Ramunno, Stephen Hughes
Single photon sources (SPSs) are an essential resource for many quantum information technologies. We demonstrate how the inclusion of time-delayed coherent feedback in a scalable w…
Inverse design of optical pulse shapes for time-varying photonics
Joshua Baxter, Lora Ramunno
There has been an explosion of interest in time-varying photonics due to the recent discovery and design of materials and metamaterials with strong, time-varying, nonlinear optical…
Understanding the nonlinear optical response of epsilon near zero materials in the time-domain
Joshua Baxter, Adriana Pérez-Casanova, Luis Cortes-Herrera +3
The promise of active nanophotonics technology relies on the confinement and control of light at the nanoscale. Confinement via plasmonics, dielectric resonators, and waveguides ca…
Quantum Trajectory Theory and Simulations of Nonlinear Spectra and Multi-Photon Effects in Waveguide-QED Systems with a Time-Delayed Coherent Feedback
Gavin Crowder, Lora Ramunno, Stephen Hughes
We study the nonlinear spectra and multi-photon correlation functions for the waveguide output of a two-level system (including realistic dissipation channels) with a time-delayed…
On the performance of optical phased array technology for beam steering
Antonio Cala' Lesina, Dominic Goodwill, Eric Bernier +2
Optical phased arrays are of strong interest for beam steering in telecom and LIDAR applications. A phased array ideally requires that the field produced by each element in the arr…
Hyperpolarizability of plasmonic meta-atoms in metasurfaces
M. Saad Bin-Alam, Joshua Baxter, Kashif M. Awan +7
Plasmonic metasurfaces are promising as enablers of nanoscale nonlinear optics and flat nonlinear optical components. Nonlinear optical responses of such metasurfaces are determine…
Parallel FDTD modelling of nonlocality in plasmonics
Joshua Baxter, Antonino Calà Lesina, Lora Ramunno
As nanofabrication techniques become more precise, with ever smaller feature sizes, the ability to model nonlocal effects in plasmonics becomes increasingly important. While nonloc…
Optical phased arrays for LIDAR: beam steering via tunable plasmonic metasurfaces
Antonino Calà Lesina, Dominic Goodwill, Eric Bernier +2
Controlling the phase and amplitude of light emitted by the elements (i.e., pixels) of an optical phased array is of paramount importance to realizing dynamic beam steering for LID…
Plasmonic colours predicted by deep learning
Joshua Baxter, Antonino Calà Lesina, Jean-Michel Guay +3
Picosecond laser pulses have been used as a surface colouring technique for noble metals, where the colours result from plasmonic resonances in the metallic nanoparticles created a…
Mechanism of Laser Induced Filamentation in dielectrics
Neda Naseri, Gabriel Dupras, Lora Ramunno
Laser filamentation in transparent material has a wide range of applications, from three dimensional manufacturing to biological technologies. Various experimental results showed t…
Origin of third harmonic generation in plasmonic nanoantennas
Antonino Calà Lesina, Pierre Berini, Lora Ramunno
Plasmonic nanoantennas have been recently proposed to boost nonlinear optical processes. In a metal dipole nanoantenna with a dielectric nanoparticle placed in the gap, the linear…
Chiral Huygens metasurfaces for nonlinear structuring of linearly polarized light
A. Calà Lesina, P. Berini, L. Ramunno
We report on a chiral nanostructure, which we term a "butterfly nanoantenna," that, when used in a metasurface, allows the direct conversion of a linearly polarized beam into a non…
Enhanced plasmonic coloring of silver and formation of large laser-induced periodic surface structures using multi-burst picosecond pulses
J. -M. Guay, A. Calà Lesina, J. Baxter +5
We report on the creation of angle-independent colors on silver using closely time-spaced laser bursts. The use of burst mode, compared to traditional non-burst is shown to increas…
Topographical coloured plasmonic coins
Jean-Michel Guay, Antonino Calà Lesina, Guillaume Côté +4
The use of metal nanostructures for colourization has attracted a great deal of interest with the recent developments in plasmonics. However, the current top-down colourization met…
Effective Transparency in the XUV: A Pump-Probe Test of Atomistic Laser-Cluster Models
Rishi Pandit, Kasey Barrington, Thomas Teague +4
The effective transparency of rare-gas clusters, post-interaction with an extreme ultraviolet (XUV) pump pulse, is predicted by using an atomistic hybrid quantum-classical molecula…
Imaging the noncentrosymmetric structural organisation of tissue with Interferometric Second Harmonic Generation microscopy
Maxime Rivard, Konstantin Popov, Mathieu Laliberte +7
We report the imaging of tendon, a connective tissue rich in collagen type I proteins, with Interferometric Second Harmonic Generation (I-SHG) microscopy. We observed that the nonc…
Clusters in Intense XUV pulses: effects of cluster size on expansion dynamics and ionization
Edward Ackad, Nicolas Bigaouette, Kyle Briggs +1
We examine the effect of cluster size on the interaction of Ar-Ar with intense extreme ultraviolet (XUV) pulses, using a model we developed earlier that includes io…
Augmented collisional ionization via excited states in XUV cluster interactions
Edward Ackad, Nicolas Bigaouette, Lora Ramunno
The impact of atomic excited states is investigated via a detailed model of laser-cluster interactions, which is applied to rare gas clusters in intense femtosecond pulses in the e…
Steplike intensity threshold behavior of extreme ionization in laser-driven Xe clusters
T. Döppner, J. P. Müller, A. Przystawik +7
The generation of highly charged Xe ions up to {} is observed in Xe clusters embedded in helium nanodroplets and exposed to intense femtosecond laser pulses (=800 n…