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Vincenzo Savona

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Publications associées (95)

Driven-dissipative quantum Monte Carlo method for open quantum systems

Vincenzo Savona, Alexandra Nagy

We develop a real-time full configuration-interaction quantum Monte Carlo approach to model driven-dissipative open quantum systems with Markovian system-bath coupling. The method enables stochastic sampling of the Liouville–von Neumann time evolution of t ...

2018

Disorder effects on the coupling strength of coupled photonic crystal slab cavities

Vincenzo Savona, Juan Pablo Vasco Cano

We study the effects of disorder on the coupling strength of coupled photonic crystal slab cavities by considering fully-3D electromagnetic calculations. Specifically, we investigate two coupled L3 cavities at 30 degrees and 60 degrees configurations, wher ...

2018

Observation of the Unconventional Photon Blockade

Vincenzo Savona, Hugo Pierre Alexandre Flayac

We observe the unconventional photon blockade effect in quantum dot cavity QED, which, in contrast to the conventional photon blockade, operates in the weak coupling regime. A single quantum dot transition is simultaneously coupled to two orthogonally pola ...

2018

Finite-Size and Disorder Effects on Slow-Light Propagation in an Extended Photonic Crystal Coupled-Cavity Waveguides with Group-Index Bandwidth Product Exceeding 0.47

Vincenzo Savona, Romuald Houdré, Momchil Minkov, Mohamed Sabry Abdel-Aliem Mohamed

IEEE2018

Two-Color Pump-Probe Measurement of Photonic Quantum Correlations Mediated by a Single Phonon

Vincenzo Savona, Christophe Marcel Georges Galland, Kilian Robert Seibold, Hugo Pierre Alexandre Flayac, Mitchell David Anderson, Santiago Tarrago Velez

We propose and demonstrate a versatile technique to measure the lifetime of the one-phonon Fock state using two-color pump-probe Raman scattering and spectrally resolved, time-correlated photon counting. Following pulsed laser excitation, the n = 1 phonon ...

2018

Ultra-wide-band structural slow light

Vincenzo Savona, Romuald Houdré, Momchil Minkov, Mohamed Sabry Abdel-Aliem Mohamed

The ability of using integrated photonics to scale multiple optical components on a single monolithic chip offers key advantages to create miniature light-controlling chips. Numerous scaled optical components have been already demonstrated. However, presen ...

Nature Research2018

Influence of Disorder and Finite-Size Effects on Slow Light Transport in Extended Photonic Crystal Coupled-Cavity Waveguides

Vincenzo Savona, Romuald Houdré, Momchil Minkov, Mohamed Sabry Abdel-Aliem Mohamed

A convenient approach for slowing down light in integrated optical circuits is by utilizing a set of coupled microcavities in a photonic crystal lattice. While this provides for flexibility in dispersion engineering, light transport is influenced by a comb ...

2018

Efficient continuous-wave nonlinear frequency conversion in high-Q gallium nitride photonic crystal cavities on silicon

Vincenzo Savona, Jean-François Carlin, Romuald Houdré, Nicolas Grandjean, Matteo Galli, Momchil Minkov, Mohamed Sabry Abdel-Aliem Mohamed

We report on nonlinear frequency conversion from the telecom range via second harmonic generation (SHG) and third harmonic generation (THG) in suspended gallium nitride slab photonic crystal (PhC) cavities on silicon, under continuous-wave resonant excitat ...

2017

Spontaneous symmetry breaking in a quadratically driven nonlinear photonic lattice

Vincenzo Savona

We investigate the occurrence of a phase transition, characterized by the spontaneous breaking of a discrete symmetry, in a driven-dissipative Bose-Hubbard lattice in the presence of two-photon coherent driving. The driving term does not lift the original ...

Amer Physical Soc2017

Unconventional photon blockade

Vincenzo Savona, Hugo Pierre Alexandre Flayac

We review the unconventional photon blockade mechanism. This quantum effect remarkably enables a strongly sub-Poissonian light statistics, even from a system characterized by a weak single-photon nonlinearity. We revisit the past results, which can be inte ...

Amer Physical Soc2017

Nonclassical statistics from a polaritonic Josephson junction

Vincenzo Savona, Hugo Pierre Alexandre Flayac

We theoretically study the emission statistics of a weakly nonlinear photonic dimer during coherent oscillations. We show that the phase and population dynamics allow to periodically meet an optimal squeezing condition resulting in a strongly nonclassical ...

Amer Physical Soc2017

Photonic crystal slab cavity simultaneously optimized for ultra-high Q/V and vertical radiation coupling

Vincenzo Savona, Momchil Minkov

We present a design for a two-dimensional photonic crystal slab cavity in which the electric field localization is due to an extra hole in the lattice, as opposed to the more standard procedure of removal of holes. This leads to a tighter field confinement ...

American Institute of Physics2017

Emergent transport in a many-body open system driven by interacting quantum baths

Vincenzo Savona, Juris Reisons, Eduardo Carlo Mascarenhas Moraes

We analyze an open many-body system that is strongly coupled at its boundaries to interacting quantum baths. We show that the two-body interactions inside the baths induce emergent phenomena in the spin transport. The system and baths are modeled as indepe ...

Amer Physical Soc2017

Laser from a many-body correlated medium

Vincenzo Savona, Hugo Pierre Alexandre Flayac, Eduardo Carlo Mascarenhas Moraes

We consider a nonequilibrium system of interacting emitters described by the XXZ model, whose excitonic transitions are spatially and spectrally coupled to a single mode cavity. We demonstrate that the output radiation field is sensitive to an interplay be ...

Amer Physical Soc2016

A compact, integrated silicon device for the generation of spectrally filtered, pair-correlated photons

Vincenzo Savona, Momchil Minkov

The third-order nonlinearity of silicon gives rise to a spontaneous four-wave mixing process in which correlated photon pairs are generated. Sources based on this effect can be used for quantum computation and cryptography, and can in principle be integrat ...

Iop Publishing Ltd2016

Single photons from dissipation in coupled cavities

Vincenzo Savona, Hugo Pierre Alexandre Flayac

We propose a single-photon source based on a pair of weakly nonlinear optical cavities subject to a one-directional dissipative coupling. When both cavities are driven by mutually coherent fields, sub-Poissonian light is generated in the target cavity even ...

Amer Physical Soc2016

Haldane quantum Hall effect for light in a dynamically modulated array of resonators

Vincenzo Savona, Momchil Minkov

Topological insulators have attracted abundant attention for a variety of reasons-notably, the possibility for lossless energy transport through edge states "protected" against disorder. Topological effects such as the quantum Hall state can be induced thr ...

Optical Soc Amer2016

Matrix-product-operator approach to the nonequilibrium steady state of driven-dissipative quantum arrays

Vincenzo Savona, Hugo Pierre Alexandre Flayac, Eduardo Carlo Mascarenhas Moraes

We develop a numerical procedure to efficiently model the nonequilibrium steady state of one-dimensional arrays of open quantum systems based on a matrix-product operator ansatz for the density matrix. The procedure searches for the null eigenvalue of the ...

American Physical Society2015

Wide-band slow light in compact photonic crystal coupled-cavity waveguides

Vincenzo Savona, Momchil Minkov

Slow light has a variety of applications, in particular for enhanced nonlinear effects like four-wave mixing and high-harmonic generation. Here, we propose a photonic crystal coupled-cavity waveguide with an ultracompact arrangement of the constituent cavi ...

Optical Soc Amer2015

Remote macroscopic entanglement on a photonic crystal architecture

Vincenzo Savona, Momchil Minkov, Hugo Pierre Alexandre Flayac

The outstanding progress in nanostructure fabrication and cooling technologies allows what was unthinkable a few decades ago: bringing single-mode mechanical vibrations to the quantum regime. The coupling between photon and phonon excitations is a natural ...

American Physical Society2015

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