A5001823279- Photonic and Optical Devices
- Semiconductor Quantum Structures and Devices
- Semiconductor Lasers and Optical Devices
- Mechanical and Optical Resonators
- Force Microscopy Techniques and Applications
- Photonic Crystals and Applications
- Quantum Dots Synthesis And Properties
- Quantum Information and Cryptography
- Advanced Semiconductor Detectors and Materials
- Quantum optics and atomic interactions
- Advanced Photonic Communication Systems
- Advanced Fiber Optic Sensors
- Acoustic Wave Resonator Technologies
- Advanced MEMS and NEMS Technologies
- Molecular Junctions and Nanostructures
- Optical Network Technologies
Korean Academy of Science and Technology
2024
Korea Advanced Institute of Science and Technology
2024
Pusan National University
2019-2020
Centre National de la Recherche Scientifique
2011-2018
Institut Néel
2011-2018
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2017-2018
Université Grenoble Alpes
2011-2018
CEA Grenoble
2017-2018
Korea Institute of Science and Technology
2016-2018
Institut Nanosciences et Cryogénie
2017-2018
We demonstrate a single-photon collection efficiency of $(44.3\pm2.1)\%$ from quantum dot in low-Q mode photonic-crystal cavity with purity $g^{(2)}(0)=(4\pm5)\%$ recorded above the saturation power. The high is directly confirmed by detecting up to $962\pm46$ kilocounts per second on detector another coupled mode. found be broadband, as explained detailed numerical simulations. Cavity-enhanced efficient excitation dots obtained through phonon-mediated and under these conditions,...
We investigated the temperature-dependent variation of photoluminescence emission energy self-organized InAs/GaAs quantum dots (QDs) grown by conventional Stranski-Krastanov (SK) molecular beam epitaxy and migration-enhanced (MEMBE) that MEMBE InAs QDs in a symmetric an asymmetric In0.2Ga0.8As/GaAs well. The each QD is analyzed low high temperature regions, including sigmoidal behavior SK with well-known Varshni semi-empirical Fan models.
We introduce a nondestructive method to determine the position of randomly distributed semiconductor quantum dots (QDs) integrated in solid photonic structure. By setting structure an oscillating motion, we generate large stress gradient across QDs plane. then exploit fact that emission frequency is highly sensitive local material map deeply embedded wire antenna with accuracy ranging from ±35 nm down ±1 nm. In context fast developing technologies, this technique can be generalized different...
We evidence the influence of surface effects for InAs quantum dots embedded into GaAs photonic nanowires used as efficient single photon sources. observe a continuous temporal drift emission energy that is an obstacle to resonant optics experiments at level. attribute sticking oxygen molecules onto wire, which modifies charge and hence electric field seen by dot. The temperature excitation laser power on this phenomenon studied. Most importantly, we demonstrate proper treatment nanowire...
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...
We investigate the non-linear mechanical dynamics of a nano-optomechanical mirror formed by suspended membrane pierced photonic crystal. By applying to periodic electrostatic force induced interdigitated electrodes integrated below membrane, we evidence superharmonic resonances our nano-electro-mechanical system; constant phase shift oscillator across resonance tongues is observed on onset principal harmonic and subharmonic excitation regimes.
We investigate the quantum confinement effects on excitons in several types of strain-free GaAs/Al 0.3 Ga 0.7 As droplet epitaxy (DE) dots (QDs). By performing comparative analyses energy-dispersive X-ray spectroscopy with aid a three-dimensional (3D) envelope-function model, we elucidate individual characteristics QD band structures respect to their composition profiles and asymmetries geometrical shapes. precisely controlling exciton oscillator strength QDs, envisage possibility tailoring...
Here, we investigate the stoichiometry control of GaAs/Al0.3Ga0.7As droplet epitaxy (DE) quantum dots (QDs). Few tens core nonstoichiometries in Ga(As) atomic percent are revealed as-grown "strain-free" QDs using state-of-the-art atomic-scale energy-dispersive X-ray spectroscopy based on transmission electron microscopy. Precise systematic analyses demonstrate a successful quenching nonstoichiometry below 2%. The chemical reactions with well-controlled ex situ annealing sheds light...
We investigate the strain-mediated control of individual single quantum dots (QDs) embedded in a multi-degree-of-freedom optomechanical resonator. The mechanical eigenfrequencies and their mode degeneracy resonator are tailored MHz regime for geometrical aspect ratio conventional wire stress-induced modification QD exciton dynamics is evaluated at multitude resonances including genuine cases degeneracy. show that stress fields allow an emission energies with rate up to several meV/nm. Such...
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...
Abstract Herein, we present the calculated strain-induced control of single GaAs/AlGaAs quantum dots (QDs) integrated into semiconductor micropillar cavities. We show precise energy individual GaAs QD excitons under multi-modal stress fields tailored optomechanical resonators. Further, using a three-dimensional envelope-function model, evaluated mechanical correction in band structures depending on their geometrical shape asymmetries and, more interestingly, practical degree Al...
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.
We study the nonlinear dynamics induced in suspended nanomembranes pierced by a photonic crystal acting as deformable mirror operating at normal incidence. The membrane is acted upon applying an electrostatic force interdigitated electrodes integrated below membrane. Bistability and high-order sub-harmonic resonances are observed.