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Article Dans Une Revue Optics Letters Année : 2019

Free-Space Micro-Graphics with Electrically Driven Levitated Light Scatterers

Nicolas Bonod

Résumé

Levitation of optical scatterers provides a new mean to develop free-space volumetric displays. The principle is to illuminate a levitating particle displaced at high velocity in three dimensions (3D) to create images based on persistence of vision (POV). Light scattered by the particle can be observed all around the volumet-ric display and therefore provides a true 3D image that does not rely on interference effects and remains insensitive to the angle of observation. The challenge is to control with a high accuracy and at high speed the tra-jectory of the particle in three dimensions. Here we use electrically driven planar Paul traps (PPTs) to control the trajectory of electrically charged particles. A single gold particle colloid is manipulated in three dimensions through AC and DC electrical voltages applied to a PPT. Electric voltages can be modulated at high frequencies (150 kHz) and allow for a high speed displacement of particles without moving any other system component. The optical scattering of the particle in levitation yields free-space images that are imaged with conventional optics. The trajectory of the particle is entirely encoded in the electric voltage and driven through stationary planar electrodes. We show in this paper, the proof-of-concept for the generation of 3D free space graphics with a single electrically scanned particle.
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Dates et versions

hal-02398358 , version 1 (07-12-2019)

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Johann Berthelot, Nicolas Bonod. Free-Space Micro-Graphics with Electrically Driven Levitated Light Scatterers. Optics Letters, 2019, 44 (6), pp.1476-1479. ⟨10.1364/OL.44.001476⟩. ⟨hal-02398358⟩
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