Photonic-crystal based concave mirror for highly coherent stable external-cavity semiconductor laser

International audienc

Low-noise III-V metasurface based semiconductor vortex laser and rotational Doppler velocimetry

International audienc

Control of new spatial, temporal and polarization coherent light states with VeCSEL: VORTEX, continuum, THz, spin

International audienc

A hybrid Photonic Crystal−based semiconductor Bragg mirror: A low loss functional mirror for high−Q external cavity lasers

International audienc

Photonic crystal-based flat lens integrated on a Bragg mirror for high-Q external cavity low noise laser

International audienc

Few-photon all-optical phase rotation in a quantum-well micropillar cavity

Photonic platforms are an excellent setting for quantum technologies because weak photon-environment coupling ensures long coherence times. The second key ingredient for quantum photonics is interactions between photons, which can be provided by optical nonlinearities in the form of cross-phase-modulation (XPM). This approach underpins many proposed applications in quantum optics and information processing, but achieving its potential requires strong single-photon-level nonlinear phase shifts and also scalable nonlinear elements. In this work we show that the required nonlinearity can be provided by exciton-polaritons in micropillars with embedded quantum wells. These combine the strong interactions of excitons with the scalability of micrometer-sized emitters. We observe XPM up to 3±1 mrad per particle using laser beams attenuated to below single photon average intensity. With our work serving as a first stepping stone, we lay down a route for quantum information processing in polaritonic lattices

Carbon-supported Pt and PtRu nanoparticles as catalysts for a direct methanol fuel cell

10.1021/jp049422bJournal of Physical Chemistry B108248234-8240JPCB

Roadmap on Label-Free Super-Resolution Imaging

Label-free super-resolution (LFSR) imaging relies on light-scattering processes in nanoscale objects without a need for fluorescent (FL) staining required in super-resolved FL microscopy. The objectives of this Roadmap are to present a comprehensive vision of the developments, the state-of-the-art in this field, and to discuss the resolution boundaries and hurdles that need to be overcome to break the classical diffraction limit of the label-free imaging. The scope of this Roadmap spans from the advanced interference detection techniques, where the diffraction-limited lateral resolution is combined with unsurpassed axial and temporal resolution, to techniques with true lateral super-resolution capability that are based on understanding resolution as an information science problem, on using novel structured illumination, near-field scanning, and nonlinear optics approaches, and on designing superlenses based on nanoplasmonics, metamaterials, transformation optics, and microsphere-assisted approaches. To this end, this Roadmap brings under the same umbrella researchers from the physics and biomedical optics communities in which such studies have often been developing separately. The ultimate intent of this paper is to create a vision for the current and future developments of LFSR imaging based on its physical mechanisms and to create a great opening for the series of articles in this field