Quantum Optics

Over recent years, transverse approaches appeared thanks to the new geometries made possible by the technology expertise of the team (1D confinement of photons and electrons in structures such as nanowires, but also by taking into account (and use as a resource) the local environment of phonons and charges.

These approaches, theoretically and experimentally, open a new chapter of quantum optics, not within reach of isolated atoms systems, namely the quantum optics in a solid environment.

Our research are oriented in 3 axes, based on :

  1. (1) the control of the environment (phononic and/or free carriers)
  2. (2) the control of the dimensionality (1D, 0D, 2D),
  3. (3) the control of the emission properties of the single quantum emitter.

These 3 ideas structure and cross fertilize the various subjects we are motivated to study :

  • Hybrid opto-mechanical systems : the phonon environment will be here a degree of freedom (1), and oscillators will be photonics wires (2).
  • Non-linear optical spectroscopy in photonic wires, axes (1) and (3) : especially we intend to measure the Four-Wave Mixing signal of single QD to study the exciton coherence, and the one of two QDs to demonstrate the radiative coupling between them in a photonic wire.
  • Condensation of 1D polaritons (axe (2)), and interaction polaritons –phonons (axe (1)).
  • complete control of the many degrees of freedom of the field emitted by a single quantum emitter : the temporal emission profile can be tuned by Purcell switching using time resolved injection of free carriers, entanglement can be generatedby using tunable single photon sources and pair of intricated photons, finally coupling the emitter to plasmonic nanoantennas offers a way to control the emission diagram.
  • Last but not least, theoretical models will be developed to provide both, support for all these quantum optics experiments in solid state, and predictions for some thermodynamic effects in quantum information.
Cohérence quantique - CQ

Cohérence quantique - CQ

Révéler des phénomènes quantiques dans des circuits électroniques nanométriques
Hélium : du fondamental aux applications - HELFA

Hélium : du fondamental aux applications - HELFA

Hélium comme système modèle, hydrodynamique et turbulence, spatial et astrophysique, instrumentation et développement cryogénique.
Magnétisme et Supraconductivité - MagSup

Magnétisme et Supraconductivité - MagSup

Equipe Magnétisme et supraconductivité à l’Institut NEEL - Systèmes impliquant différents degrés de liberté comme la charge, le spin ou le réseau.
Optique et Matériaux - OPTIMA

Optique et Matériaux - OPTIMA

Rassembler une chaine de compétence complète qui va de la synthèse et l’élaboration de matériaux nouveaux à l’étude des propriétés optiques non linéaires et plasmoniques
Matériaux, Rayonnements, Structure - MRS

Matériaux, Rayonnements, Structure - MRS

Compréhension des propriétés physico-chimiques de matériaux complexes sur la base d’une connaissance fine de leur structure
Micro et NanoMagnétisme - MNM

Micro et NanoMagnétisme - MNM

Complementary expertise in fabrication, characterisation, and simulations for studies in nanomagnetism with applications in spin electronics and micro-systems
Nano-Electronique Quantique et Spectroscopie - QNES

Nano-Electronique Quantique et Spectroscopie - QNES

Transport électronique et spectroscopie locale de structures quantiques
Nano-Optique et Forces - NOF

Nano-Optique et Forces - NOF

Nano - optique et forces
Nanophysique et Semiconducteurs - NPSC

Nanophysique et Semiconducteurs - NPSC

Élaboration de nanostructures de semi-conducteurs III-V et II-VI et étude de leurs propriétés physiques en vue de nouvelles fonctionnalités
Nanospintronique et Transport Moléculaire - NanoSpin

Nanospintronique et Transport Moléculaire - NanoSpin

Studying magnetism at the nanoscale, where classical and quantum properties can be combined and used for molecular quantum spintronics
Semi-conducteurs à large bande interdite - SC2G

Semi-conducteurs à large bande interdite - SC2G

De la physique du diamant et autres semi-conducteurs à grand gap vers les applications en électronique et biotechnologies
Surfaces, Interfaces et Nanostructures - SIN

Surfaces, Interfaces et Nanostructures - SIN

Etudes expérimentales et théoriques de systèmes de basse dimensionnalité
Systèmes Hybrides de basse dimensionnalité - HYBRID

Systèmes Hybrides de basse dimensionnalité - HYBRID

Propriétés électroniques, optiques, vibrationnelles, mécaniques, et leur couplage à l’échelle quantique, de nouveaux systèmes hybrides (nanotubes, graphène, matériaux bi-dimensionnels, fonctionnalisés) que l’équipe développe.
Théorie de la Matière Condensée -TMC

Théorie de la Matière Condensée -TMC

Phénomènes physiques nouveaux dans les matériaux et systèmes modèles.
Thermodynamique et biophysique des petits systèmes - TPS

Thermodynamique et biophysique des petits systèmes - TPS

Instrumentation ultrasensible pour sonder les propriétés électronique et thermique : de la matière condensée à basse température aux systèmes biologiques à l’ambiante.
Théorie Quantique des Circuits - ThQC

Théorie Quantique des Circuits - ThQC

Étude théorique du transport électronique dans des dispositifs nanométriques aux propriétés quantiques remarquables.
Ultra-basses températures - UBT

Ultra-basses températures - UBT

La physique quantique à la limite des ultra-basses températures.

Coupler un atome artificiel à un microfil vibrant

Des physiciens ont réalisé un système hybride associant un fil vibrant et un atome artificiel formé par une boîte quantique semi-conductrice. Le couplage entre ces deux systèmes, reposant sur des effets de contrainte mécanique, est une première étape vers la possibilité de transférer les propriétés quantiques de l’atome artificiel vers l’oscillateur mécanique.

Photon Detection - superconducting detectors

1-presentation The goals of this project are the fabrication and the characterisation of superconducting photons counters. These bolometric photo-detectors are made of an ultrathin ( 2- Operating principle These detectors are made of a superconducting strip of a few microns long, 250 nm wide... > suite

Single Photon : Manipulation

People : Experiment : Gilles Nogues, Jean-Philippe Poizat, Signe Seidelin, PhD Student : Inah Yeo ; Technical staff : Edouard Wagner Theory : Alexia Auffèves ; Post-doc : Stefano Portolan, PhD students, Igor Diniz, Daniel Valente. Principle We aim at realizing a CNOT gate between single... > suite

Single photon – Production

People : Optics : Kuntheak Kheng, Jean-Philippe Poizat ; PhD Student : Samir Bounouar Growth : Régis André, Edith Belley, Catherine Bougerol, Martien den Hertog, Serge Tatarenko ; Phd student : Miryam Elouneg-Jamroz Production - Single photon from single semiconducting quantum dots Quantum... > suite

Quantum optics with II-VI quantum dots

People : Régis André, Jean-Michel Gérard, Kuntheak Kheng, Henri Mariette, Jean-Philippe Poizat, Robert Romestain Photon correlation experiments We report correlation and cross-correlation measurements of photons emitted under continuous wave excitation by a single II–VI quantum dot (QD) grown by... > suite

Theory of Cavity Quantum Electrodynamics with solid-state emitters and cavities

People : Alexia Auffèves, Jean-Philippe Poizat, Jean-Michel Gérard 1. Spontaneous emission of a quantum dot in a semi-conducting cavity Our aim is to study how the results of Cavity Quantum Electrodynamics (CQED) are modified when one replaces an isolated two-level atom by a solid-state atom... > suite

Quantum optics in 1D atoms

Exploring light-matter interaction at the single photon level is a quest of quantum optics, that has been successfully achieved so far with emitters in microwave or optical cavities. In such systems high atom-field couplings are obtained by trapping light in high quality factor resonators. Recently, alternative strategies have emerged, based on the broadband coupling of the emitter to a one-dimensional (1D) electromagnetic environment. These new devices invite to revisit important results of quantum optics, when the emitter interacts with propagating photons. We have studied the optical response of such one-dimensional atom when it is excited with a monochromatic classical pump. Going to the fully quantized picture, we have investigated the dynamics of an initially inverted atom in a waveguide in the presence of a single propagating photon. This works sheds new light on the physics of stimulated emission and opens the path to appealing applications for integrated quantum information and communication processing.

Cavity quantum electrodynamics in a solid by nonlinear spectroscopy

Individual modes for radiation and matter can be realized, on the one hand by confining photons in solid state resonant cavities and, on the other hand, by confining an electron and a hole in a semiconductor Quantum Dot (QD), so as to create an atom-like species called an exciton. When these... > suite

From Single Particle to Superfluid Excitations in a Dissipative Polariton Fluid

Excitons-polaritons are the elementary bosonic excitations of semiconductor microcavity in the so-called strong coupling regime. Owing to their bosonic and interacting nature, and in spite of their driven-dissipative nature, polaritons are found to exhibit superfluid behavior. As pointed out by Bogoliubov in his celebrated theory of superfluidity, the phenomena of superfluidity arises from a profound transformation of the nature of the excitations of the system, at the normal to superfluid transition. Using a non-linear optical spectroscopic technique, we observed directly this transformation, and reported for the first time an experimental measurement of the polariton superfluid linear dispersion, reminiscent of sound wave excitation (sometime referred to as zero sound), accompanied by a characteristic lower energy anomalous dispersion branch.

Single III-N quantum dot spectroscopy

People : Régis André, Joël Bleuse, Le Si Dang, Bruno Daudin, Bruno Gayral, Jean-Michel Gérard, Kuntheak Kheng, Henri Mariette, Marlène Terrier Benoît Amstatt, Sebastien Founta, Laurent Maingault, Sebastien Moehl, Julien Renard, Fabian Rol, Franck Tinjod, Adrien Tribu Overview and results GaN... > suite

Bose-Einstein Condensation of exciton polaritons

People : Robert Romestain†, Régis André, Le Si Dang Jacek Kasprzak, Maxime Richard Results : Why Microcavity Polaritons ? Bosons are integer spin particles, which can undergo BEC when their thermal de Broglie wavelength becomes comparable to their average separation. Then a... > suite

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