非线性无序介质中的介观光传输

arXiv - PHYS - Optics Pub Date : 2024-09-09 DOI:arxiv-2409.05488

Alfonso Nardi, Andrea Morandi, Romain Pierrat, Arthur Goetschy, Xuanchen Li, Frank Scheffold, Rachel Grange

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引用次数: 0

摘要

非线性无序介质独特地结合了多重散射和二次谐波生成。在这里，我们研究了在这种介质中产生的非线性光的统计特性。我们报告了二次谐波斑点强度的超雷利统计特性，并证明它是由极端散射条件下产生的介观相关性引起的。所测得的电导率是在各向同性散射三维介质中观测到的最低值，可应用于宽带二次谐波生成、非线性无序介质中的波前整形和光子计算。

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Mesoscopic light transport in nonlinear disordered media

Nonlinear disordered media uniquely combine multiple scattering and second-harmonic generation. Here, we investigate the statistical properties of the nonlinear light generated within such media. We report super-Rayleigh statistics of the second-harmonic speckle intensity, and demonstrate that it is caused by the mesoscopic correlations arising in extreme scattering conditions. The measured conductance is the lowest ever observed in an isotropically scattering 3D medium, with applications in broadband second-harmonic generation, wavefront shaping in nonlinear disordered media, and photonic computing.

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arXiv - PHYS - Optics

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