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Experimental Realization of Optimal Energy Storage in Resonators Embedded in Scattering Media

Abstract : 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.
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https://hal.archives-ouvertes.fr/hal-03140363
Contributor : Fabrice Mortessagne <>
Submitted on : Wednesday, April 7, 2021 - 11:46:18 AM
Last modification on : Friday, April 9, 2021 - 9:20:33 AM

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Philipp Hougne, Rémi Sobry, Olivier Legrand, Fabrice Mortessagne, Ulrich Kuhl, et al.. Experimental Realization of Optimal Energy Storage in Resonators Embedded in Scattering Media. Laser and Photonics Reviews, Wiley-VCH Verlag, 2021, 15 (3), pp.2000335. ⟨10.1002/lpor.202000335⟩. ⟨hal-03140363⟩

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