0000000000707268

AUTHOR

Sergey V. Makarov

showing 2 related works from this author

Tuning the Ultrafast Response of Fano Resonances in Halide Perovskite Nanoparticles

2020

International audience; The full control of the fundamental photophysics of nanosystems at frequencies as high as few THz is key for tunable and ultrafast nanophotonic devices and metamaterials. Here we combine geometrical and ultrafast control of the optical properties of halide perovskite nanoparticles, which constitute a prominent platform for nanophotonics. The pulsed photoinjection of free carriers across the semiconducting gap leads to a subpicosecond modification of the far-field electromagnetic properties that is fully controlled by the geometry of the system. When the nanoparticle size is tuned so as to achieve the overlap between the narrowband excitons and the geometry-controlled…

Materials scienceTerahertz radiationNanophotonicsFOS: Physical sciencesGeneral Physics and AstronomyPhysics::Optics02 engineering and technology010402 general chemistrySettore FIS/03 - FISICA DELLA MATERIA01 natural sciencesOptical switchhalide perovskites nanoparticles[SPI]Engineering Sciences [physics]Fano resonance; halide perovskites nanoparticles; ultrafast photophysics; nanophotonics; Mie resonancesPhysics::Atomic and Molecular Clusters[CHIM]Chemical SciencesGeneral Materials ScienceThin filmPhysics::Chemical PhysicsPerovskite (structure)[PHYS]Physics [physics]Condensed Matter - Materials Sciencebusiness.industryMie resonancesGeneral EngineeringMaterials Science (cond-mat.mtrl-sci)Fano resonanceMetamaterialSettore ING-INF/02 - Campi Elettromagnetici021001 nanoscience & nanotechnology0104 chemical sciencesOptoelectronicsFano resonancenanophotonics0210 nano-technologybusinessultrafast photophysicsUltrashort pulseOptics (physics.optics)Physics - Optics
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Opto-thermally controlled beam steering in nonlinear all-dielectric metastructures

2021

Reconfigurable metasurfaces have recently gained a lot of attention in applications such as adaptive meta-lenses, hyperspectral imaging and optical modulation. This kind of metastructure can be obtained by an external control signal, enabling us to dynamically manipulate the electromagnetic radiation. Here, we theoretically propose an AlGaAs device to control the second harmonic generation (SHG) emission at nanoscale upon optimized optical heating. The asymmetric shape of the used meta-atom is selected to guarantee a predominant second harmonic (SH) emission towards the normal direction. The proposed structure is concurrently excited by a pump beam at a fundamental wavelength of 1540 nm and…

Materials sciencebusiness.industrynonlinear opticsBeam steeringSecond-harmonic generationbeam steering02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesAtomic and Molecular Physics and Optics010309 opticsmetasurfaceWavelengthOpticsModulationMetamaterials0103 physical sciencesHarmonicContinuous wave0210 nano-technologybusinessRefractive indexBeam (structure)Optics Express
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