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.
Quantum coherence - CQ

Quantum coherence - CQ

Revealing quantum phenomena in electronic nano-circuits
Helium : from fundamental to applications - HELFA

Helium : from fundamental to applications - HELFA

Helium as model system, hydrodynamic and turbulence, space and astrophysics, instrumentation and cryogenic development, kinetic inductance detectors.
Magnetism and Superconductivity - MagSup

Magnetism and Superconductivity - MagSup

Team Magnetism and Superconductivity at Institut NEEL - Systems involving charge, spin or lattice degrees of freedom.
Optics and materials - OPTIMA

Optics and materials - OPTIMA

a complete chain of competences that goes from the design and elaboration of new materials to the study of nonlinear optical properties and plasmonics
Materials, Radiations, Structure - MRS

Materials, Radiations, Structure - MRS

Understanding of the physico-chemical properties of complex materials based on the precise description of their structure
Micro and NanoMagnetism - MNM

Micro and NanoMagnetism - MNM

Complementary expertise in fabrication, characterisation, and simulations for studies in nanomagnetism with applications in spin electronics and micro-systems
Quantum Nano-Electronics and Spectroscopy - QNES

Quantum Nano-Electronics and Spectroscopy - QNES

Electron transport and local spectroscopy of quantum structures
Nano-Optics and Forces - NOF

Nano-Optics and Forces - NOF

Nano - optics and forces
Nanophysics and Semiconductors - NPSC

Nanophysics and Semiconductors - NPSC

Growth of III-V and II-VI semiconductor nanostructures and their physics in search of new functions for potential applications.
Nanospintronics and Molecular Transport - NanoSpin

Nanospintronics and Molecular Transport - NanoSpin

Studying magnetism at the nanoscale, where classical and quantum properties can be combined and used for molecular quantum spintronics
Wide bandgap semiconductors - SC2G

Wide bandgap semiconductors - SC2G

Physics of diamond and other wide bandgap semiconductors towards applications in electronics and biotechnologies
Surfaces, Interfaces and Nanostructures - SIN

Surfaces, Interfaces and Nanostructures - SIN

Experimental and theoretical studies of low dimensional systems
Hybrid systems at low dimensions - HYBRID

Hybrid systems at low dimensions - HYBRID

Electronic, optical, vibrational, mechanical properties, as well as their interplay at the nanoscale, of novel hybrid systems (nanotubes, graphene, two-dimensional and functionalized materials) which are developed by the group .
Condensed Matter Theory -TMC

Condensed Matter Theory -TMC

Novel physical phenomena in materials and model systems.
Thermodynamics and Biophysics of small systems - TPS

Thermodynamics and Biophysics of small systems - TPS

Ultra-sensitive instrumentation for electrical and thermal measurements: from biophysics to low temperature condensed matter physics.
Theory of Quantum Circuits - ThQC

Theory of Quantum Circuits - ThQC

Theoretical studies of electronic transport in nanometer-scale devices showing remarkable quantum effects.
Ultra-low temperatures - UBT

Ultra-low temperatures - UBT

Quantum physics at the ultra-low temperature frontier.

Strain-mediated coupling in a quantum dot–mechanical oscillator hybrid system

We have realized an hybrid system made of a vibrating wire and a semiconducting quantum dot. The very large coupling between these two subsystems relies on mechanical strain, and is a first step towards the possibility of mapping the quantum properties of a single two-level system made by the quantum dot onto a mechanical oscillator

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... > read more

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... > read more

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... > read more

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