THAKUR, Siddharatha; TAMARAT, Philippe; ROCHET, Antonine; BIRK, Joschka; VESHCHUNOV, Ivan; BEZARD, Malo; BUZDIN, Alexander; TREBBIA, Jean-Baptiste; LOUNIS, Brahim

doi:10.1364/OE.494474

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THAKUR, Siddharatha
Laboratoire Photonique, Numérique et Nanosciences [LP2N]

TAMARAT, Philippe
Laboratoire Photonique, Numérique et Nanosciences [LP2N]

ROCHET, Antonine
Laboratoire Photonique, Numérique et Nanosciences [LP2N]

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Ce document a été publié dans

Optics Express. 2023-07, vol. 31, n° 15, p. 24194-24202

Résumé en anglais

Magneto-optical imaging of quantized magnetic flux tubes in superconductors-Abrikosov vortices-is based on Faraday rotation of light polarization within a magneto-optical indicator placed on top of the superconductor. Due to severe aberrations induced by the thick indicator substrate, the spatial resolution of vortices is usually well beyond the optical diffraction limit. Using a high refractive index solid immersion lens placed onto the indicator garnet substrate, we demonstrate wide field optical imaging of single flux quanta in a Niobium film with a resolution better than 600 nm and sub-second acquisition periods, paving the way to high-precision and fast vortex manipulation. Vectorial field simulations are also performed to reproduce and optimize the experimental features of vortex images.< Réduire

Mots clés en anglais

Magneto-optical imaging

superconductor

SIL

vortex

immersion lens

DOI

http://dx.doi.org/10.1364/OE.494474

Project ANR

Manipulation optique de quanta de flux individuels dans les supraconducteurs et applications - ANR-17-CE30-0018

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Unités de recherche

Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798