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Hugo Pierre Alexandre Flayac

Cette personne a quitté l’EPFL

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Publications associées (22)

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Bloch oscillations of an exciton-polariton Bose-Einstein condensate

Hugo Pierre Alexandre Flayac

We study theoretically Bloch oscillations of half-matter, half-light quasiparticles: exciton-polaritons. We propose an original structure for the observation of this phenomenon despite the constraints imposed by the relatively short lifetime of the particl ...

2011

Input-output theory of the unconventional photon blockade

Vincenzo Savona, Hugo Pierre Alexandre Flayac

We study the unconventional photon blockade, recently proposed for a coupled-cavity system, in the presence of input and output quantum fields. Mixing of the input or output channels still allows strong photon antibunching of the output field, but for opti ...

American Physical Society2013

Parametric inversion of spin currents in semiconductor microcavities

Hugo Pierre Alexandre Flayac

The optical spin-Hall effect results in the formation of an antisymmetric real-space polarization pattern giving birth to spin currents. In this work, we show that the exciton-polariton parametric scattering allows us to reverse the sign of these currents. ...

Amer Physical Soc2013

Heralded Preparation and Readout of Entangled Phonons in a Photonic Crystal Cavity

Vincenzo Savona, Hugo Pierre Alexandre Flayac

We propose a realistic protocol for the preparation and readout of mechanical Bell states in an optomechanical system. The proposal relies on parameters characterizing a photonic crystal cavity mode, coupled to two localized flexural modes of the structure ...

American Physical Society2014

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

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

Non-Abelian Gauge Fields in Photonic Cavities and Photonic Superfluids

Hugo Pierre Alexandre Flayac

We show that the TE-TM modes splitting and the structure anisotropy of a semiconductor microcavity combine into a non-Abelian gauge field for exciton-polaritons or cavity photons. The field texture can be tuned simply by rotating the sample and ranges cont ...

Amer Physical Soc2014

Exciton-polariton flows in cross-dimensional junctions

Hugo Pierre Alexandre Flayac

We study the nonequilibrium exciton-polariton condensation in 1D to 0D and 1D to quasi-2D junctions by means of non-resonant spectroscopy. The shape of our potential landscape allows to probe the resonant transmission of a propagating condensate between a ...

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

An exciton-polariton mediated all-optical router

Hugo Pierre Alexandre Flayac

We propose an all-optical nonlinear router based on a double barrier gate connected to periodically modulated guides. A semiconductor microcavity is driven nonresonantly in-between the barriers to form an exciton-polariton condensate on a discrete state th ...

Amer Inst Physics2013

Remote macroscopic entanglement on a photonic crystal architecture

Vincenzo Savona, Hugo Pierre Alexandre Flayac, Momchil Minkov

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

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

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

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

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

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

Multivalley engineering in semiconductor microcavities

Hugo Pierre Alexandre Flayac, Timothy Chi Hin Liew

We consider exciton-photon coupling in semiconductor microcavities in which separate periodic potentials have been embedded for excitons and photons. We show theoretically that this system supports degenerate ground-states appearing at non-zero inplane mom ...

Springer Nature2017

Bright solitons in non-equilibrium coherent quantum matter

Hugo Pierre Alexandre Flayac

We theoretically demonstrate a mechanism for bright soliton generation in spinor non-equilibrium Bose-Einstein condensates made of atoms or quasi-particles such as polaritons in semiconductor microcavities. We give analytical expressions for bright (half) ...

Royal Soc2016

Dissipative soliton protocols in semiconductor microcavities at finite temperatures

Hugo Pierre Alexandre Flayac

We consider exciton polaritons in a semiconductor microcavity with a saturable absorber in the growth direction of the heterostructure. This feature promotes additional nonlinear losses of the system with the emergence of bistability of the condensate part ...

Amer Physical Soc2015

Counter-directional polariton coupler

Louis Vina, Hugo Pierre Alexandre Flayac, Christoph Schneider

We report on an on-chip routing device for propagating condensates of exciton-polaritons. This counter-directional coupler implements signal control by a photonic microdisk potential, which couples two lithographically defined waveguides and reverses the c ...

AMER INST PHYSICS2019

Kinetic Monte Carlo approach to nonequilibrium bosonic systems

Hugo Pierre Alexandre Flayac, Timothy Chi Hin Liew

We consider the use of a kinetic Monte Carlo approach for the description of nonequilibrium bosonic systems, taking nonresonantly excited exciton-polariton condensates and bosonic cascade lasers as examples. In the former case, the considered approach allo ...

Amer Physical Soc2017

Superfluidity of spinor Bose-Einstein condensates

Hugo Pierre Alexandre Flayac

We consider a spin-1/2 Bose-Einstein condensate initially prepared in a single-spin projection. The two channels of dynamical excitations existing in such a system (density and spin waves) are discussed and we show how pure spin waves can be excited in the ...

Amer Physical Soc2013