Holographic reconstruction of magnetic field distribution in a Josephson junction from diffraction-like <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>I</mml:mi><mml:mi>c</mml:mi></mml:msub><mml:mrow><mml:mo>(</mml:mo><mml:mi>H</mml:mi><mml:mo>)</mml:mo></mml:mrow></mml:mrow></mml:math> patterns
نویسندگان
چکیده
A general problem of magnetic sensors is a trade-off between spatial resolution and magnetic-field sensitivity. With decreasing sensor size its improved but the sensitivity deteriorated. Obviation such requires development super-resolution imaging technique not limited by size. Here we present proof concept for method Josephson junction (JJ). It based on solution an inverse problem---reconstruction local distribution within from dependence critical current external field, ${I}_{c}(H)$. The resembles Fourier-transform holography, with diffractionlike ${I}_{c}(H)$ pattern serving as hologram. simple solution, valid arbitrary symmetric case, derived. We verify numerically show that accuracy reconstruction does depend only field range pattern. Finally, tested experimentally using planar Nb JJs. Super-resolution stray fields Abrikosov vortex, trapped in electrodes, demonstrated. Thus our facilitates both high resolution, obviating sensors. conclude holographic JJ can be used scanning probe microscopy.
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2022
ISSN: ['1098-0121', '1550-235X', '1538-4489']
DOI: https://doi.org/10.1103/physrevb.105.214513