Inverse Scattering of Periodic Surfaces with Multilayer Superlenses: Perturbation Analysis and Resolution Enhancement

Haoqiang Xiao; Guang-Hui Zheng

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arXiv · 2610.38423

Inverse Scattering of Periodic Surfaces with Multilayer Superlenses: Perturbation Analysis and Resolution Enhancement

Haoqiang Xiao·Guang-Hui Zheng

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Abstract

This paper presents a rigorous mathematical analysis of inverse scattering for periodic surfaces through a multilayer superlens. Using the transformed field expansion, we derive a highly explicit reconstruction formula. We theoretically prove that under perfect matching, the reconstruction factor is independent of the number of layers and depends solely on the total material thicknesses, achieving uniform boundedness when the slab thickness dominates. By establishing first-order perturbation formulas and high-frequency asymptotics, we quantify how small material losses induce exponential amplification of high-frequency errors. Crucially, we show that increasing the number of layers substantially reduces this amplification coefficient. Consequently, for fixed total thicknesses, multilayer structures offer significantly improved stability and extended resolution limits for subwavelength reconstruction.

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Haoqiang Xiao, Guang-Hui Zheng. 2026-10-28. Inverse Scattering of Periodic Surfaces with Multilayer Superlenses: Perturbation Analysis and Resolution Enhancement. https://arxiv.org/abs/2610.38423

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