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Vincenzo Savona

Cette personne a quitté l’EPFL

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Publications associées (94)

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Coherent coupling between distant excitons revealed by two-dimensional nonlinear hyperspectral imaging

Vincenzo Savona

Coherent coupling between distant two-level systems is a fundamental process in several physical contexts, from natural photosynthesis to quantum-information processing, where it enables two-qubit operations. For quantum information, qubits based on electr ...

Nature Publishing Group2011

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

Quantum entanglement in nanocavity arrays

Vincenzo Savona, Timothy Chi Hin Liew

We show theoretically how quantum interference between linearly coupled modes with weak local nonlinearity allows the generation of continuous variable entanglement. By solving the quantum master equation for the density matrix, we show how the entanglemen ...

2012

Landau–Zener without a qubit: multiphoton sidebands interaction and signatures of dissipative quantum chaos

Vincenzo Savona, Pasquale Scarlino, Fabrizio Minganti, Marco Scigliuzzo, Vincent Jean Yves Jouanny, Filippo Ferrari, Léo Paul Peyruchat

Landau–Zener–Stückelberg–Majorana (LZSM) interference occurs when qubit parameters are periodically modulated across avoided level crossings. We explore this phenomenon in nonlinear multilevel bosonic systems, where interference is influenced by multiple e ...

2025

Automated optimization of photonic crystal slab cavities

Vincenzo Savona, Momchil Minkov

Thanks to their high quality factor, combined to the smallest modal volume, defect-cavities in photonic crystal slabs represent a promising, versatile tool for fundamental studies and applications in photonics. In paricular, the L3, H0, and H1 defects are ...

Nature Publishing Group2014

Adaptive variational low-rank dynamics for open quantum systems

Vincenzo Savona, Luca Gravina

We introduce a model-independent method for the efficient simulation of low-entropy systems, whose dynamics can be accurately described with a limited number of states. Our method leverages the time-dependent variational principle to efficiently integrate ...

Amer Physical Soc2024

Zero dimensional exciton-polaritons

Benoît Marie Joseph Deveaud, Vincenzo Savona, François Morier-Genoud, Jean-Philippe Brantut, Gaël Nardin, Ounsi El Daïf, Reda Idrissi Kaitouni

We present a novel semiconductor structure in which 0D polaritons coexist with 2D microcavity polaritons. Spatial trapping of the 2D microcavity polaritons results from the confinement of their photonic part in a potential well, consisting of an adjustable ...

2006

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

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

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

IEEE2018

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

Towards thermal equilibrium in the Bose-Einstein condensation of microcavity polaritons

Vincenzo Savona, Davide Sarchi

By comparing a kinetic and a thermal-equilibrium theory of polariton Bose-Einstein condensation, we study under what conditions the dynamical condensation under steady-state non-resonant pumping can approach thermal equilibrium. In particular, we study the ...

2007

Single Photons from Coupled Quantum Modes

Vincenzo Savona, Timothy Chi Hin Liew

Single photon emitters often rely on a strong nonlinearity to make the behavior of a quantum mode susceptible to a change in the number of quanta between one and two. In most systems, the strength of nonlinearity is weak, such that changes at the single qu ...

American Physical Society2010

Genetically designed L3 photonic crystal nanocavities with measured quality factor exceeding one million

Vincenzo Savona, Matteo Galli, Momchil Minkov

We report on the experimental realization of ultra-high quality factor (Q) designs of the L3-type photonic crystal nanocavity. Based on genetic optimization of the positions of few nearby holes, our design drastically improves the performance of the conven ...

American Institute of Physics2014

Localization-dependent photoluminescence spectrum of biexcitons in semiconductor quantum wires

Benoît Marie Joseph Deveaud, Vincenzo Savona, Andrea Feltrin

We study exciton and biexciton spectra in disordered semiconductor quantum wires by means of nanophotoluminescence spectroscopy. We demonstrate a close link between the exciton localization length along the wire and the occurrence of a biexciton spectral l ...

2005

Ultralong-range radiative excitation transfer between quantum dots in a planar microcavity

Vincenzo Savona, Gaetano Parascandolo, Guillaume Jean Tarel

We study the system of two quantum dots lying on the central plane of a planar semiconductor microcavity. By solving the full Maxwell problem, we demonstrate that the rate of resonant excitation transfer between the two dots decays as d(-12) as a function ...

2008

Unconventional photon blockade in doubly resonant microcavities with second-order nonlinearity

Vincenzo Savona

It is shown that noncentrosymmetric materials with bulk second-order nonlinear susceptibility can be used to generate strongly antibunched radiation at an arbitrary wavelength, solely determined by the resonant behavior of suitably engineered coupled micro ...

Amer Physical Soc2014

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

Gallium nitride L3 photonic crystal cavities with an average quality factor of 16 900 in the near infrared

Nicolas Grandjean, Jean-François Carlin, Vincenzo Savona, Raphaël Butté, Matteo Galli, Momchil Minkov, Noelia Vico Triviño

Photonic crystal point-defect cavities were fabricated in a GaN free-standing photonic crystal slab. The cavities are based on the popular L3 design, which was optimized using an automated process based on a genetic algorithm, in order to maximize the qual ...

American Institute of Physics2014

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

Coherent dynamics and parametric instabilities of microcavity polaritons in double-well systems

Vincenzo Savona, Davide Sarchi

We investigate the physics of coherent polaritons in a double-well configuration under a resonant pumping. For a continuous-wave pump, bistability and self-pulsing regimes are identified as a function of the pump energy and intensity. The response to an ad ...

2008