The ability to enhance light–matter interactions by increasing the energy stored in optical resonators is inherently dependent on the resonators' coupling to the incident wavefront. In practice, weak coupling may result from resonators' irregular shapes and/or the scrambling of waves in the surrounding scattering environment. Here, a blind and non‐invasive wavefront shaping technique providing optimal coupling to resonators is presented. The coherent control of the incident wavefront relies on the lengthening of delay times of waves efficiently exciting the resonator. Using a modal approach, the optimality of the proposed technique is proven and its limitations are quantified. The proposed concept is demonstrated in microwave experiments by injecting in situ optimal wavefronts that maximize the energy stored in high‐permittivity dielectric scatterers and extended leaky cavities embedded in a complex environment. The introduced framework is expected to find important applications in the enhancement of light–matter interactions in photonic materials as well as to enhance energy harvesting.

中文翻译：

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嵌入散射介质的谐振器中最佳能量存储的实验实现

通过增加存储在光学谐振器中的能量来增强光与物质相互作用的能力，本质上取决于谐振器与入射波前的耦合。在实践中，弱耦合可能是由于谐振器的不规则形状和/或周围散射环境中的波扰动引起的。在这里，提出了一种盲和无创波前整形技术，可提供与谐振器的最佳耦合。入射波前的相干控制取决于有效激发谐振器的波的延迟时间的延长。使用模态方法，证明了所提出技术的最优性，并定量了其局限性。在微波实验中，通过注入原位最佳波阵面证明了所提出的概念，该波阵面可最大化存储在高介电常数介电散射体中的能量以及复杂环境中嵌入的扩展泄漏腔。预计引入的框架将在增强光子材料中的光-物质相互作用以及增强能量收集方面找到重要的应用。