A5102774967- Semiconductor Quantum Structures and Devices
- Quantum Information and Cryptography
- Photonic and Optical Devices
- Mechanical and Optical Resonators
- Quantum optics and atomic interactions
- Semiconductor Lasers and Optical Devices
- Quantum and electron transport phenomena
- Quantum Dots Synthesis And Properties
- Quantum Mechanics and Applications
- Advanced Optical Sensing Technologies
- Near-Field Optical Microscopy
- Random lasers and scattering media
- Spectroscopy and Laser Applications
- Magnetic properties of thin films
- Laser-Matter Interactions and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Strong Light-Matter Interactions
- Terahertz technology and applications
- Advanced Photonic Communication Systems
- Optical Network Technologies
- Surface Roughness and Optical Measurements
Université Grenoble Alpes
2015-2018
Institut Néel
2015-2018
Centre National de la Recherche Scientifique
2015-2018
Institut polytechnique de Grenoble
2018
CEA Grenoble
2015
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2015
Université Joseph Fourier
2015
Technical University of Munich
2015
École Normale Supérieure - PSL
2006-2009
The desiderata for an ideal photon source are high brightness, single-photon purity, and indistinguishability. Defining brightness at the first collection lens, these properties have been simultaneously demonstrated with solid-state sources, however absolute efficiencies remain close to 1% level, indistinguishability only photons emitted consecutively on few nanosecond scale. Here we employ deterministic quantum dot-micropillar devices demonstrate sources scalable performance. In one device,...
Solid-state emitters are excellent candidates for developing integrated sources of single photons. Yet, phonons degrade the photon indistinguishability both through pure dephasing zero-phonon line and phonon-assisted emission. Here, we study theoretically experimentally photons emitted by a semiconductor quantum dot in microcavity as function temperature. We show that large coupling to high quality factor cavity can simultaneously reduce effect phonon-induced decoherence. It first limits on...
We investigate theoretically the generation of indistinguishable single photons from a strongly dissipative quantum system placed inside an optical cavity. The degree indistinguishability emitted by cavity is calculated as function emitter-cavity coupling strength and linewidth. For emitter subject to strong pure dephasing, our calculations reveal that unconventional regime high can be reached for moderate emittercavity strengths quality factor cavities. In this regime, broad spectrum...
Abstract In a quantum network based on atoms and photons, single atom should control the photon state and, reciprocally, allow coherent manipulation of atom. Both operations require controlling environment developing efficient atom–photon interfaces, for instance by coupling natural or artificial to cavities. So far, much attention has been drown manipulating light field with atomic transitions, recently at few-photon limit. Here we report reciprocal operation demonstrate an few photons. We...
Quantum dots in cavities have been shown to be very bright sources of indistinguishable single photons. Yet the quantum interference between two such dot sources, a critical step for photon-based computation, still needs investigated. Here, we report on measurement, taking advantage deterministic fabrication devices. We show that cavity electrodynamics can efficiently improve remote sources: Poorly photons interfere with good contrast high quality emitted by source strong Purcell regime. Our...
Bright single photon sources have recently been obtained by inserting solid-state emitters in microcavities. Accelerating the spontaneous emission via Purcell effect allows both high brightness and increased operation frequency. However, achieving enhancement is technologically demanding because emitter resonance must match cavity resonance. Here, we show that this spectral matching requirement strongly lifted phononic environment of emitter. We study a InGaAs quantum dot coupled to...
We investigate the interband transitions in several ensembles of self-assembled $\mathrm{In}\mathrm{As}∕\mathrm{Ga}\mathrm{As}$ quantum dots by using photoluminescence excitation spectroscopy under strong magnetic fields up to $28\phantom{\rule{0.3em}{0ex}}\mathrm{T}$. Well-defined resonances are observed spectra. The field dependence resonance energies allows an unambiguous assignment which involve both discrete states and wetting layer states. A anticrossing between two is all samples,...
The influence of electron-phonon interactions on the dynamics a quantum dot coupled to photonic cavity mode is investigated by using nonequilibrium Green's function approach. Within polaron frame, self-consistent-Born approximation used treat phonon-assisted scattering processes between and cavity. Two-time correlators dot-cavity system are calculated solving Kadanoff--Baym equations, giving access photon spectra indistinguishability. non-Markovian nature interaction with phonon bath shown...
Optical non-linearities usually appear for large intensities, but discrete transitions allow giant operating at the single photon level. This has been demonstrated in last decade a optical mode with cold atomic gases, or two-level systems coupled to light via tailored photonic environment. Here we demonstrate two-modes non-linearity by using three-level structure semiconductor quantum dot (QD) embedded wire antenna. The coupling efficiency and broad operation bandwidth of enable us have two...
Abstract We investigate the interband transitions in several ensembles of self‐assembled InAs/GaAs quantum dots by using photoluminescence excitation spectroscopy under strong magnetic field. Well defined resonances are observed spectra. Astrong anticrossing between two is all samples, which cannot be accounted for a purely excitonic model. The coupling mixed exciton‐LO phonon states calculated Fröhlich Hamiltonian. polaron energies as well oscillator strengths determined. An predicted when...
Resonant photoluminescence experiments performed on self-assembled InAs/GaAs quantum dots under strong magnetic field up to 28 T give rise an accurate determination of the interband magneto-optical transitions. As this technique minimizes effect homogeneous broadening transitions due size and composition fluctuations dots, experimental spectra display well-defined peaks. A good agreement is found between data calculations using effective mass model including coupling mixed exciton-LO phonon...
Summary form only given. Optical logic down to the single photon level holds promise of data processing with a better energy efficiency than electronic devices [1]. In addition, preservation quantum coherence in such logical components would enable optical gates [2-8]. requires non-linearities allow for photon-photon interactions. Non-linearities usually appear large intensities, but discrete transitions well coupled two-level system giant operating at level.This is achieved by engineering...
Single photons are the natural link between nodes of a quantum network: they coherently propagate and interact with many types bits including artificial atoms. Ideally, one atom should deterministically control state photon vice-versa. The interaction free space an is however intrinsically weak efforts have been dedicated to develop efficient interface. Recently, it was shown that propagation light can be controlled by atomic resonance coupled cavity or single mode waveguide. Here we...
Using a single InAs quantum dot embedded in GaAs photonic wire, we realize giant non-linearity between two optical modes to experimentally demonstrate an all-optical transistor triggered by 10 photons.
Phonons degrade the photon indistinguishability in solid-state single-photon devices. Here we demonstrate robustness of non-postselected single-photons against phonon-induced sources decoherence coupled quantum dot-cavity devices working under strong Purcell regime.
We studied experimentally and theoretically a single-photon source consisting of quantum dot coupled to micropillar cavity. The influence the LA-phonon bath on brightness indistinguishability emitted photons will be discussed.
Pure and bright single photon sources have recently been obtained by inserting solid-state emitters in photonic nanowires or microcavities. The cavity approach presents the attractive possibility to greatly increase source operation frequency. However, it is perceived as technologically demanding because emitter resonance must match resonance. Here we show that spectral matching requirement actually strongly lifted intrinsic coupling of its environment. A consisting a InGaAs quantum dot...