A5014511117- Orbital Angular Momentum in Optics
- Optical Polarization and Ellipsometry
- Advanced Fiber Laser Technologies
- Near-Field Optical Microscopy
- Photonic and Optical Devices
- Digital Holography and Microscopy
- Laser-Matter Interactions and Applications
- Advanced Fluorescence Microscopy Techniques
- Optical measurement and interference techniques
- Optical Coatings and Gratings
- Experimental and Theoretical Physics Studies
- Quantum Mechanics and Applications
- Advanced optical system design
- Optical Coherence Tomography Applications
- Quantum optics and atomic interactions
- Optical and Acousto-Optic Technologies
- Advanced Measurement and Metrology Techniques
- Cold Atom Physics and Bose-Einstein Condensates
- Microfluidic and Bio-sensing Technologies
- Electromagnetic Scattering and Analysis
- Quantum Information and Cryptography
- Radio Astronomy Observations and Technology
- Advanced Electron Microscopy Techniques and Applications
- Metamaterials and Metasurfaces Applications
- Advanced Optical Imaging Technologies
Aix-Marseille Université
2018-2025
Institut Fresnel
2018-2025
University of Rochester
2016-2025
Château Gombert
2018-2024
Centrale Marseille
2018-2024
Centre National de la Recherche Scientifique
2018-2024
Energetics (United States)
2023-2024
University of Ottawa
2023
Quantum Chemistry Research Institute
2023
RIKEN
2023
We explore the behavior of a class fully correlated optical beams that span entire surface Poincaré sphere. The can be constructed from coaxial superposition fundamental Gaussian mode and spiral-phase Laguerre-Gauss having orthogonal polarizations. When polarizations are right left circular, coverage extends one pole sphere to other in such way concentric circles on beam map onto parallels radial lines meridians. If waist parameters match, is stereographic propagation corresponds rigid...
We give an exact self-consistent operator description of the spin and orbital angular momenta, position, spin-orbit interactions nonparaxial light in free space. Both quantum-operator formalism classical energy-flow approach are presented. apply general theory to symmetric asymmetric Bessel beams exhibiting spin- orbital-dependent intensity profiles. The wave solutions clearly interpreted terms Berry phases, quantization caustics, Hall effects light, which can be readily observed experimentally.
Abstract Structured waves are ubiquitous for all areas of wave physics, both classical and quantum, where the wavefields inhomogeneous cannot be approximated by a single plane wave. Even interference two waves, or (evanescent) wave, provides number nontrivial phenomena additional functionalities as compared to Complex with inhomogeneities in amplitude, phase, polarization, including topological structures singularities, underpin modern nanooptics photonics, yet they equally important, e.g....
This tutorial gives an overview of the use Wigner function as a tool for modeling optical field propagation. Particular emphasis is placed on spatial propagation stationary fields, well pulses through dispersive media. In first case, representation that similar to radiance or weight distribution all rays in system, since its arguments are both position and direction. cases which paraxial where system described by simple linear relation ray regime, constant under along rays. An equivalent...
We present a general theory of spin-to-orbital angular momentum (AM) conversion light in focusing, scattering, and imaging optical systems. Our employs universal geometric transformations nonparaxial fields such systems allows for direct calculation comparison the AM efficiency different physical settings. Observations conversions using local intensity distributions far-field polarimetric measurements are discussed.
We study the properties of pulsed solutions to scalar and vector wave equations composed plane-waves with equal longitudinal spatial frequency. This condition guarantees that, at all times, field profile is invariant in direction. Particular emphasis placed on rotational symmetry. For these solutions, concentrates strongly near axis a given time. provide closed-form expressions for some fields, show that their wavefronts are approximately spherical. Solutions carrying orbital spin angular...
Structured light has revolutionized optical particle manipulation, nano-scaled material processing, and high-resolution imaging. In particular, propagation-invariant fields such as Bessel, Airy, or Mathieu beams show high robustness have a self-healing nature. To generalize beneficial features, these can be understood in terms of caustics. However, only simple caustics found applications trapping, cell microscopy. Thus, technologies would greatly benefit from methods to engineer arbitrary...
Optical wave packets that are localized in space and time, but nevertheless overcome diffraction travel rigidly free space, a long sought-after field structure with applications ranging from microscopy remote sensing, to nonlinear quantum optics. However, synthesizing such requires introducing non-differentiable angular dispersion high spectral precision two transverse dimensions, capability has eluded optics date. Here, we describe an experimental strategy capable of sculpting the...
Polarization singularities and topological polarization structures are generic features of inhomogeneous vector wave fields any nature. However, their experimental studies mostly remain restricted to optical waves. Here, we report the observation singularities, Möbius-strip structures, skyrmionic textures in 3D sound Our experiments made ultrasonic domain using nonparaxial propagating generated by space-variant 2D acoustic sources. We also retrieve distributions spin density these fields....
This tutorial provides an overview of the local description polarization for nonparaxial light, which all Cartesian components electric field are significant. The light at each point is characterized by a $3$ component vector in case full or $3\times3$ matrix partial polarization. Standard concepts paraxial like degree polarization, Stokes parameters and Poincar\'e sphere then have generalizations that either not unique trivial. work aims to clarify some these discrepancies, present new...
Optical contrasts in microscopy are sensitive to light polarization, whose interaction with molecular dipoles provides an important lever for probing orientation. Polarization has evolved considerably during the last decade, integrating strategies ranging from traditional linear dichroism single-molecule orientation and localization imaging. This review aims provide a summary of concepts techniques behind structural imaging at level, ensemble 2D super-resolution 3D.
A general family of structured Gaussian beams naturally emerges from a consideration families rays. These ray families, with the property that their transverse profile is invariant upon propagation (except for cycling rays and global rescaling), have two parameters, first giving position on an ellipse represented by point Poincar\'e sphere (familiar polarization optics), other determining curve traced out this sphere. This construction accounts familiar beams, including Hermite-Gauss,...
Quantum optics and classical are linked in ways that becoming apparent as a result of numerous recent detailed examinations the relationships elementary notions have with each other. These include interference, polarization, coherence, complementarity entanglement. All them present both quantum optics. They historic origins, at least partly for this reason not all quantitative definitions universally accepted. This makes further investigation into their engagement very desirable. We pay...
We introduce and produce experimentally optical beams exhibiting periodic skyrmionic polarization lattices at each transverse plane of propagation. These textures are meron formed by tiles mapping hemispheres the Poincar\'e sphere. All presented fields combinations a small number waves. Firstly, we propose square with Skyrme density (the Jacobian between sphere physical space) that oscillates in sign but whose intensity distribution is constant. Secondly, present triangular preserving...
We describe and analyze a method by which an optical polarization state is mapped to image sensor. When placed in Bayesian framework, the analysis allows priori information about be introduced into measurement. show that when such measurement applied single photon, it eliminates exactly one fully polarized state, offering important insight gained from photon
The connection between Poincaré spheres for polarization and Gaussian beams is explored, focusing on the interpretation of elliptic in terms isotropic two-dimensional harmonic oscillator Hamiltonian mechanics, its canonical quantization semiclassical interpretation. This leads to structured modes, Hermite-Gaussian, Laguerre-Gaussian generalized Hermite-Laguerre-Gaussian modes as eigenfunctions operators corresponding classical constants motion oscillator, which acquire an extra significance...
The group velocity of 'space-time' wave packets - propagation-invariant pulsed beams endowed with tight spatio-temporal spectral correlations can take on arbitrary values in free space. Here we investigate theoretically and experimentally the maximum achievable delay that realistic finite-energy space-time achieve respect to a reference pulse traveling at speed light. We find this is determined solely by uncertainty association between spatial frequencies wavelengths underlying packet...
Geometric phases are a universal concept that underpins numerous phenomena involving multi-component wave fields. These polarization-dependent inherent in interference effects, spin–orbit interaction phenomena, and topological properties of vector have been thoroughly studied two-component fields, such as two-level quantum systems or paraxial optical waves. However, their description for fields with three more components, generic nonparaxial routinely used modern nano-optics, constitutes...
Propagation-invariant pulsed beams are generated by introducing appropriate tight correlations in their spatiotemporal spectrum. Such constitute an example of what has been called "classical entanglement," which is a necessary but insufficient requirement for propagation invariance. We demonstrate theoretically and experimentally that standard measure entanglement, the Schmidt number, determines distance under wave packets retain shape. Reduction this degree classical entanglement manifests...
Abstract Transverse (Hall-effect) and Goos–Hänchen shifts of light beams reflected/refracted at planar interfaces are important wave phenomena, which can be significantly modified enhanced by the presence intrinsic orbital angular momentum (OAM) in beam. Recently, optical spatiotemporal vortex pulses (STVPs) carrying a purely transverse OAM were predicted theoretically generated experimentally. Here we consider reflection refraction such isotropic interface. We find confirm numerically novel...
In single-molecule orientation localization microscopy, valuable information about the and longitudinal position of each molecule is often encoded in shape point spread function (PSF). Yet, this can be significantly affected by aberrations other imperfections imaging system, leading to an erroneous estimation measured parameters. A basic solution model as a scalar mask pupil plane that characterized through phase retrieval algorithms. However, approach not suitable for cases involving...