Diagnostic within a dielectric micro-structure: time-reversal and sparsity-constrained imaging

Abstract : Computational imaging of micro-structured systems as a grid-like set of a finite number of circular cylindrical dielectric rods is considered. How to achieve meaningful localization, resolution-enhanced or, even, super-resolved, vs. the wavelength(s) of operation if defects or radiators are to be found within is discussed here. That is, the set can be seen from all around when either a line source inside an intact system of rods is to be localized, or when, now illuminated by exterior line sources, there is an unknown distribution of missing rods. One-shot time-reversal (mostly reduced as time-harmonic backpropagation, though cases involving broadband transient data will be proposed in the presentation) and iterative sparsityconstrained joint source imaging are analyzed as solution tools in both TE and TM polarizations.
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https://hal-centralesupelec.archives-ouvertes.fr/hal-01889654
Contributeur : Dominique Lesselier <>
Soumis le : dimanche 7 octobre 2018 - 15:20:21
Dernière modification le : mardi 11 décembre 2018 - 14:50:05

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  • HAL Id : hal-01889654, version 1

Citation

Peipei Ran, Zicheng Liu, Dominique Lesselier, Mohammed Serhir. Diagnostic within a dielectric micro-structure: time-reversal and sparsity-constrained imaging. 2018. 〈hal-01889654〉

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