34 citations · 259 across the 21 of their papers we have counts for
21 papers
Pulse shaping in the terahertz frequency range for the control of photo-excited carriers in graphene
Denis Gagnon, Joey Dumont, François Fillion-Gourdeau +1
The shape of a few-cycle terahertz (THz) laser pulse can be optimized to provide control over conduction band populations in graphene. To demonstrate this control in a theoretical…
Carrier-envelope phase effects in graphene
C. Lefebvre, D. Gagnon, F. Fillion-Gourdeau +1
We numerically study the interaction of a terahertz pulse with monolayer graphene. We observe that the electron momentum density is affected by the carrier-envelope phase (CEP) of…
Pulse shape optimization for electron-positron production in rotating fields
François Fillion-Gourdeau, Florian Hebenstreit, Denis Gagnon +1
We optimize the pulse shape and polarization of time-dependent electric fields to maximize the production of electron-positron pairs via strong field quantum electrodynamics proces…
Suppression of multiphoton resonances in driven quantum systems via pulse shape optimization
Denis Gagnon, François Fillion-Gourdeau, Joey Dumont +2
This Letter demonstrates control over multiphoton absorption processes in driven two-level systems, which include for example superconducting qubits or laser-irradiated graphene, t…
Efficiently parallelized modeling of tightly focused, large bandwidth laser pulses
Joey Dumont, François Fillion-Gourdeau, Catherine Lefebvre +2
The Stratton-Chu integral representation of electromagnetic fields is used to study the spatio-temporal properties of large bandwidth laser pulses focused by high numerical apertur…
Coherent destruction of tunneling in graphene irradiated by elliptically polarized lasers
Denis Gagnon, François Fillion-Gourdeau, Joey Dumont +2
Photo-induced transition probabilities in graphene are studied theoretically from the viewpoint of Floquet theory. Conduction band populations are computed for a strongly, periodic…
Numerical computation of dynamical Schwinger-like pair production in graphene
F. Fillion-Gourdeau, P. Blain, D. Gagnon +2
The density of electron-hole pairs produced in a graphene sample immersed in a homogeneous time-dependent electrical field is evaluated. Because low energy charge carriers in graph…
Time-domain quantum interference in graphene
F. Fillion-Gourdeau, D. Gagnon, C. Lefebvre +1
The electron momentum density obtained from the Schwinger-like mechanism is evaluated for a graphene sample immersed in a homogeneous time-dependent electric field. Based on the an…
Driven quantum tunneling and pair creation with graphene Landau levels
Denis Gagnon, François Fillion-Gourdeau, Joey Dumont +2
Driven tunneling between graphene Landau levels is theoretically linked to the process of pair creation from vacuum, a prediction of quantum electrodynamics (QED). Landau levels ar…
Constructive feedback for the growth of laser-induced periodic surface structures
Jean-Luc Déziel, Joey Dumont, Denis Gagnon +3
We study the formation and growth of laser-induced periodic surface structures (LIPSSs) with the finite-difference time-domain (FDTD) method. We use a recently proposed inter-pulse…
Lorenz-Mie theory for 2D scattering and resonance calculations
Denis Gagnon, Louis J. Dubé
This PhD tutorial is concerned with a description of the two-dimensional generalized Lorenz-Mie theory (2D-GLMT), a well-established numerical method used to compute the interactio…
Toward the formation of crossed laser-induced periodic surface structures
Jean-Luc Déziel, Joey Dumont, Denis Gagnon +3
The formation of a new type of laser-induced periodic surface structures using a femtosecond pulsed laser is studied on the basis of the Sipe-Drude theory solved with a FDTD scheme…
Optimization of integrated polarization filters
Denis Gagnon, Joey Dumont, Jean-Luc Déziel +1
This study reports on the design of small footprint, integrated polarization filters based on engineered photonic lattices. Using a rods-in-air lattice as a basis for a TE filter a…
Adding SALT to Coupled Microcavities: the making of active photonic molecule lasers
Denis Gagnon, Joey Dumont, Jean-Luc Déziel +1
A large body of work has accumulated over the years in the study of the optical properties of single and coupled microcavities for a variety of applications, ranging from filters t…
Ab initio investigation of lasing thresholds in photonic molecules
Denis Gagnon, Joey Dumont, Jean-Luc Déziel +1
We investigate lasing thresholds in a representative photonic molecule composed of two coupled active cylinders of slightly different radii. Specifically, we use the recently formu…
Multiobjective optimization in integrated photonics design
Denis Gagnon, Joey Dumont, Louis J. Dubé
We propose the use of the parallel tabu search algorithm (PTS) to solve combinatorial inverse design problems in integrated photonics. To assess the potential of this algorithm, we…
S and Q Matrices Reloaded: applications to open, inhomogeneous, and complex cavities
Guillaume Painchaud-April, Joey Dumont, Denis Gagnon +1
We present a versatile numerical algorithm for computing resonances of open dielectric cavities. The emphasis is on the generality of the system's configuration, i.e. the geometry…
Coherent beam shaping using two-dimensional photonic crystals
Denis Gagnon, Joey Dumont, Louis J. Dubé
Optical devices based on photonic crystals such as waveguides, lenses and beam-shapers, have received considerable theoretical and experimental attention in recent years. The produ…
Beam shaping using genetically optimized two-dimensional photonic crystals
Denis Gagnon, Joey Dumont, Louis J. Dubé
We propose the use of two-dimensional photonic crystals with engineered defects for the generation of an arbitrary-profile beam from a focused input beam. The cylindrical harmonics…
Phase Space Engineering in Optical Microcavities II: Controlling the far-field
Julien Poirier, Guillaume Painchaud-April, Denis Gagnon +1
Optical microcavities support Whispering Gallery Modes (WGMs) with a very high quality factor Q. However, WGMs typically display a far-field isotropic emission profile and modifyin…
Phase Space Engineering in Optical Microcavities I: Preserving near-field uniformity while inducing far-field directionality
Guillaume Painchaud-April, Julien Poirier, Denis Gagnon +1
Optical microcavities have received much attention over the last decade from different research fields ranging from fundamental issues of cavity QED to specific applications such a…