A5052369394- Mechanical and Optical Resonators
- Photonic and Optical Devices
- Quantum Information and Cryptography
- Orbital Angular Momentum in Optics
- Plasmonic and Surface Plasmon Research
- Near-Field Optical Microscopy
- Force Microscopy Techniques and Applications
- Diamond and Carbon-based Materials Research
- Advanced Fiber Laser Technologies
- Quantum optics and atomic interactions
- Quantum and electron transport phenomena
- Gold and Silver Nanoparticles Synthesis and Applications
- Silicon Nanostructures and Photoluminescence
- Strong Light-Matter Interactions
- Nanowire Synthesis and Applications
- Nanofabrication and Lithography Techniques
- Advanced MEMS and NEMS Technologies
- Integrated Circuits and Semiconductor Failure Analysis
- Cold Atom Physics and Bose-Einstein Condensates
- Metamaterials and Metasurfaces Applications
- Advanced biosensing and bioanalysis techniques
- Advanced Thermodynamics and Statistical Mechanics
- Photonic Crystals and Applications
- Liquid Crystal Research Advancements
- Microfluidic and Bio-sensing Technologies
Université de Sherbrooke
2021-2025
Universität Innsbruck
2017-2020
Austrian Academy of Sciences
2018-2020
Institute for Quantum Optics and Quantum Information Innsbruck
2018
Macquarie University
2013-2017
ARC Centre of Excellence for Engineered Quantum Systems
2013-2017
The University of Sydney
2014
Institute of Photonic Sciences
2009-2013
Université de Technologie de Troyes
2007-2010
Centre National de la Recherche Scientifique
2005-2009
The most striking feature of quantum mechanics is the existence superposition states, where an object appears to be in different situations at same time. such states has been previously tested with small objects, as atoms, ions, electrons and photons (Zoller et al 2005 Eur. Phys. J. D 36 203–28), even molecules (Arndt 1999 Nature 401 680–2). More recently, it shown that possible create superpositions collections (Deléglise 2008 455 510–14), atoms (Hammerer arXiv:0807.3358) or Cooper pairs...
We provide a general quantum theory to describe the coupling of light with motion dielectric object inside high-finesse optical cavity. In particular, we derive total Hamiltonian system as well master equation describing state center-of-mass mode and cavity-field mode. addition, elasticity is used study internal vibrational excitations dielectric. This applied recent proposal using an optically levitating nanodielectric cavity optomechanical [see Romero-Isart et al., New J. Phys. 12, 033015...
Gentle manipulation of micrometer-sized dielectric objects with optical forces has found many applications in both life and physical sciences. To further extend trapping toward the true nanometer scale, we present an original approach combining self-induced back action (SIBA) latest advances nanoscale plasmon engineering. The designed resonant trap, formed by a rectangular plasmonic nanopore, is successfully tested on 22 nm polystyrene beads, showing single- double-bead events. mechanism...
In this Letter, we show that the electromagnetic duality symmetry, broken in microscopic Maxwell's equations by presence of charges, can be restored for macroscopic equations. The restoration symmetry is shown to independent geometry problem. These results provide a tool study light-matter interactions within framework symmetries and conservation laws. We illustrate its use determining helicity content natural modes structures possessing spatial inversion elucidating root causes some...
Abstract Superradiance (SR) is a cooperative phenomenon which occurs when an ensemble of quantum emitters couples collectively to mode the electromagnetic field as single, massive dipole that radiates photons at enhanced rate. Previous studies on solid-state systems either reported SR from sizeable crystals with least one spatial dimension much larger than wavelength light and/or only close liquid-helium temperatures. Here, we report observation room-temperature superradiance highly...
We unveil the relationship between two anomalous scattering processes known as Kerker conditions and duality symmetry of Maxwell equations. generalize these show that they can be applied to any particle with cylindrical symmetry, not only spherical particles original were derived for. also explain role optical helicity in processes. Our results find applications field metamaterials, where new materials directional are being explored.
Optomechanics is a prime example of light matter interaction, where photons directly couple to phonons, allowing the precise control and measurement state mechanical object. This makes it very appealing platform for testing fundamental physics or sensing applications. Usually, such oscillators are in highly excited thermal states require cooling ground quantum applications, which often accomplished by using optomechanical backaction. However, while massive desirable many tasks, their...
Light-induced isomerization processes in azobenzene-containing polymers produce mass transport that is of much interest for nanoscale imaging and lithography. Yet, despite the development numerous models to simulate mechanism, no model precisely describes all experimental observations. We develop a new statistical approach correctly reproduces light-driven motion with high degree accuracy. Comparisons experiments show our predicts topographic modifications many different incident field...
Near-field scanning optical microscopy (NSOM) offers high resolution beyond the diffraction limit for various applications in imaging, sensing, and lithography; however, many very low brightness of NSOM aperture probes is a major constraint. Here, we report novel probe that gives 100× higher throughput 40× increased damage threshold than conventional near-field probes. These brighter facilitate imaging single molecules with apertures as small 45 nm diameter. We achieve this improvement by...
An analysis of light–matter interactions based on symmetries can provide valuable insight, particularly because it reveals which quantities are conserved and ones be transformed within a physical system. In this context, helicity useful addition to more commonly considered observables such as angular momentum. The question arises how treat helicity, the projection total momentum onto linear direction, in practical experiments. paper, we put forward simple but versatile experimental treatment...
Abstract We propose and analyze a passive architecture for realizing on-chip, scalable cascaded quantum devices. In contrast to standard approaches, our scheme does not rely on breaking Lorentz reciprocity. Rather, we engineer the interplay between pairs of superconducting transmon qubits microwave transmission line, in such way that two delocalized orthogonal excitations emit (and absorb) photons propagating opposite directions. show how devices can be exploited passively probe measure...
We present how the angular momentum of light can play an important role to induce a dual or anti-dual behaviour on dielectric particle. Although material particle is made not dual, i.e. does interact with electrical field in same way as it magnetic one, spherical behave system when correct excitation beam chosen. study conditions under which this induced be induced.
Cavity optomechanics, where photons are coupled to mechanical motion, provides the tools control motion near fundamental quantum limits. Reaching single-photon strong coupling would allow prepare resonator in non-Gaussian states. Preparing massive resonators such states is of particular interest for testing boundaries mechanics. This goal remains however challenging due small optomechanical couplings usually achieved with devices. Here we demonstrate a novel approach magnetically microwave...
We demonstrate near-field polarization-sensitive photochemical imaging of the optical near fields produced by metal nanostructures under a variety illumination conditions. The method relies on optically induced vectorial molecular mass transport light-sensitive polymer. experimental and theoretical results clearly show that this can map three spatial components field complex nanostructures. was applied to electromagnetic silver bowtie In particular, we find longitudinally polarized plasmons...
In this work we present a simple method to reconstruct the complex spectral wavefunction of biphoton, and hence gain complete information about temporal properties photon pair. The technique, which relies on quantum interference, is applicable biphoton states produced with monochromatic pump when shift frequency produces in relative frequencies contributing biphoton. We demonstrate an example such situation type-II parametric down-conversion (SPDC) allowing arbitrary paraxial spatial...
We present an experimental investigation of stochastic switching a bistable Josephson junctions array resonator with resonance frequency in the GHz range. As device is regime where anharmonicity on order linewidth, bistability appears for pump strength only few photons. measure dynamics by continuously observing jumps between two metastable states, which occur rate ranging from Hz down to mHz. The strongly depends strength, readout and temperature, following Kramer's law. interplay...
We use a stochastic model to study photoinduced surface relief grating (SRG) formation due molecular transport in azobenzene polymer films. The is shown reproduce the essential experimental features of SRG formation. In particular, it predicts under both p and s polarizations, double peaked topographies that can occur at early times process. evolving positions orientations during exposure are also followed, providing useful mechanistic picture dynamics.