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Dynamics of dark-soliton formation in a polariton quantum fluid

Publications associées (32)

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Phase-Resolved Imaging of Exciton Polaritons

Gaël Nardin

In this PhD thesis, new imaging techniques have been developed in order to explore the physics of semiconductor microcavities. In these structures, composite bosons called exciton polaritons are the result of strong coupling between the cavity mode and qua ...

EPFL2011

All-optical control of the quantum flow of a polariton condensate

Romuald Houdré, Cristiano Ciuti

Although photons in vacuum are massless particles that do not appreciably interact with each other, significant interactions appear in suitable nonlinear media, leading to hydrodynamic behaviours typical of quantum fluids(1-6). Here, we show the generation ...

2011

Nonlinear Spectroscopy of a Dissipative Polariton Quantum Fluid

Verena Kohnle

After the observation of Bose-Einstein condensation in the solid state in 2006 and the demonstration on its superfluid character in 2009 the interest for the demonstration of the underlying elementary excitations – the Bogoliubov excitations – was growing. ...

EPFL2011

On Zero-Dimensional Exciton-Polaritons

Roland Cerna

Microcavity exciton-polaritons are half-matter half-light quasiparticles with outstanding properties. This offers a great way to access and control fundamental excitations in a solid by simple optical means. Therefore, apart from their importance in fundam ...

EPFL2011

SHOCK IMPACT OF HIGH ENERGY/INTENSITY BEAMS WITH MATTER AND HIGH ENERGY DENSITY PHYSICS

Juan Blanco Sancho, Rudiger Schmidt

The purpose of this study is to assess the damage caused to the equipment (beamdump, collimators etc) in case of an accident involving full impact of the LHC beam. First, the FLUKA code [1] is used to calculate the proton energy loss in solid carbon and th ...

2010

On the Physics of Exciton-Polariton Condensates

Konstantinos Lagoudakis

After the first demonstration of Bose Einstein condensation in the solid state in 2006 and the establishment of exciton polariton condensates in the wider scientific community, an intense interest has been attracted by this phenomenon at both theoretical a ...

EPFL2010

Superfluidity and Critical Velocities in Nonequilibrium Bose-Einstein Condensates

We theoretically study the superfluidity properties of a nonequilibrium Bose-Einstein condensate of exciton polaritons in a semiconductor microcavity under incoherent pumping. The dynamics of the condensate is described at mean-field level in terms of a ge ...

2010

Quantum fluid properties of polaritons in semiconductor microcavities

Romuald Houdré, Cristiano Ciuti

In semiconductor quantum wells embedded in a high finesse microcavity, excitons, which are bound electron-hole systems, strongly couple to photons, forming mixed quasi-particles called polaritons. Polaritons can be coherently excited by an incident laser f ...

2010

Observation of Half Quantum Vortices in an Exciton-Polariton Condensate

Benoît Marie Joseph Deveaud, Konstantinos Lagoudakis

Singly quantized vortices have already been observed in many systems, including the superfluid helium, Bose-Einstein condensates of dilute atomic gases, and condensates of exciton-polaritons in the solid state. Two-dimensional superfluids carrying spin are ...

2009

Quantized Vortices in an Exciton-Polariton Condensate

Benoît Marie Joseph Deveaud, Konstantinos Lagoudakis

One of the most striking quantum effects in an interacting Bose gas at low temperature is superfluidity. First observed in liquid 4He, this phenomenon has been intensively studied in a variety of systems for its remarkable features such as the persistence ...

Nature Publishing Group2008