A5050632353- Photonic and Optical Devices
- Laser-Matter Interactions and Applications
- Photonic Crystals and Applications
- Quantum Information and Cryptography
- Advanced Fluorescence Microscopy Techniques
- Nonlinear Optical Materials Studies
- Mechanical and Optical Resonators
- Neural Networks and Reservoir Computing
- Quantum Computing Algorithms and Architecture
- Spectroscopy and Quantum Chemical Studies
- Quantum optics and atomic interactions
- Molecular Junctions and Nanostructures
- Plasmonic and Surface Plasmon Research
- Spectroscopy Techniques in Biomedical and Chemical Research
- Semiconductor Lasers and Optical Devices
- Advanced Optical Sensing Technologies
- Computability, Logic, AI Algorithms
- Advanced Fiber Laser Technologies
- Photochemistry and Electron Transfer Studies
- Quantum Mechanics and Applications
- Optical Network Technologies
- Biomedical Text Mining and Ontologies
- Silicon Nanostructures and Photoluminescence
- Photoacoustic and Ultrasonic Imaging
- Probability and Statistical Research
Quandela (France)
2023-2024
Vinci (France)
2023
Imperial College London
2016-2022
University of York
2019
Abstract Quantum computing aims at exploiting quantum phenomena to efficiently perform computations that are unfeasible even for the most powerful classical supercomputers. Among promising technological approaches, photonic offers advantages of low decoherence, information processing with modest cryogenic requirements, and native integration networks. So far, demonstrations light have implemented specific tasks specialized hardware, notably Gaussian boson sampling, which permits...
Single organic molecules offer great promise as bright, reliable sources of identical single photons on demand, capable integration into solid-state devices.It has been proposed that such in a crystalline matrix might be placed close to an optical waveguide for this purpose, but so far there have no demonstrations sufficiently thin crystals, with controlled concentration suitable dopant molecules.Here we present method growing very anthracene crystals from supersaturated vapour, which...
The longitudinal ($\Gamma_1$) and transverse ($\Gamma_2$) decay rates of a two-level quantum system have profound influence on its evolution. Atomic systems with $\Gamma_2=\tfrac{1}{2}\Gamma_1$ been studied extensively, but the rise solid-state devices it is also important to consider effect stronger relaxation due interactions solid environment. Here we study dynamics single organic dye molecule driven by laser. We measure variation $\Gamma_2$ temperature determine activation energy for...
We demonstrate the emission of photons from a single molecule into hybrid gap plasmon waveguide (HGPW). Crystals anthracene, doped with dibenzoterrylene (DBT), are grown on top waveguides. investigate DBT coupled to plasmonic region one guides, and determine its in-plane orientation, excited state lifetime saturation intensity. The emits light guide, which is remotely out-coupled by grating. second-order auto-correlation cross-correlation functions show that emitter emerging grating comes...
Reliable randomness is a core ingredient in algorithms and applications ranging from numerical simulations to statistical sampling cryptography. The outcomes of measurements on entangled quantum states can violate Bell inequalities, thus guaranteeing their intrinsic randomness. This constitutes the basis for certified generation. However, this certification requires spacelike separated devices, making it unfit compact apparatus. Here we provide general method generation small-scale...
Quantum computing aims at exploiting quantum phenomena to efficiently perform computations that are unfeasible even for the most powerful classical supercomputers. Among promising technological approaches, photonic offers advantages of low decoherence, information processing with modest cryogenic requirements, and native integration networks. To date, demonstrations light have implemented specific tasks specialized hardware, notably Gaussian Boson Sampling which permitted computational...
Abstract Extinction spectroscopy is a powerful tool for demonstrating the coupling of single quantum emitter to photonic structure. However, it can be challenging in all but simplest geometries deduce an accurate value efficiency from measured spectrum. Here we develop theoretical framework transmission and reflection spectra without precise knowledge environment. We then consider case waveguide interrupted by transverse cut which placed. apply that theory silicon nitride gap filled with...
Reliable randomness is a core ingredient in algorithms and applications ranging from numerical simulations to statistical sampling cryptography. The outcomes of measurements on entangled quantum states can violate Bell inequalities, thus guaranteeing their intrinsic randomness. This constitutes the basis for certified generation. However, this certification requires spacelike separated devices, making it unfit compact apparatus. Here we provide general method generation small-scale...
A reliable single photon source is required for many aspects of quantum technology. Organic molecules are attractive this application because they can have high yield and be photostable, even at room temperature. To generate a with probability, laser must excite the molecule efficiently. We develop simple model that efficiency discuss how to optimise it. demonstrate validity our through experiments on dibenzoterrylene (DBT) in an anthracene crystal. show excitation probability cannot exceed...
Semiconductor quantum dots in microcavities are an excellent platform for the efficient generation of indistinguishable single photons. However, their use a wide range technologies requires controlled fabrication and integration compact closed-cycle cryocoolers, with key challenge being stable extraction photons into single-mode fiber. Here we report on novel method fiber-pigtailing deterministically fabricated single-photon sources. Our technique allows nanometer-scale alignment accuracy...
A dibenzoterrylene (DBT) molecule can emit single-photons into a waveguide. We have grown and characterised thin, DBT-doped anthracene crystals on photonic structures, including silicon nitride ridge waveguide from which we detect single-photons.
Organic molecules show great promise as reliable photon sources. We present and analyse a thin-crystal growth technique required for efficient coupling of to SiXNY nanowire waveguides, discuss work towards achieving this coupling.
Efficient photon sources will enable many quantum technologies. Single dibenzoterrylene (DBT) molecules are promising sources, but often emit in an unknown direction making collection challenging. Dielectric structures redirect emission into single optical modes [1], relatively large due to the diffraction limit of light. Plasmonic devices, such as antennae, can concentrate electromagnetic field at site emitter on a surface volumes below and well-controlled directions, suffer from losses....
We use continuous-wave excitation of a single molecule to measure the full temporal wavepacket indistinguishability emitted photons, and show that light can determine coupling quantum emitters arbitrary nanophotonic structures.
Single organic molecules have recently seen increased interest for use as single photon sources [1] . They emit photons with high efficiency and at favourable wavelengths coupling to other quantum systems. While the excitation of their subsequent radiative emission is efficient [2] , generated can be difficult efficiently collect. There therefore a large amount ongoing work on nanophotonic structures modify emission. Evanescent [3] [4] hybrid plasmonic [5] waveguides has shown promise but...