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Perfect light trapping by nanocomposite metamaterials for sensing and energy applications

AuthorsToudert, Johann
Issue Date27-May-2019
CitationMRS Spring Meeting & Exhibit, Symposium P (2019)
AbstractFunctional materials enabling a perfect trapping of light are appealing for a broad variety of applications, including contactless sensing and energy conversion. However, this may require light to be trapped over spectral windows with very different widths: narrowband for contactless sensing versus broadband for energy conversion. Although such very different spectral responses are at the reach of metamaterials based on noble metal or standard semiconductor nanostructures tailored by multistep lithography processes, this approach is not ideal for a low-cost upscaling. In here, strategies will be proposed to achieve equivalent or even more impressive light trapping - based properties in lithography-free nanocomposite metamaterials. First, it will be demonstrated that, by harnessing the hybrid plasmonic-photonic modes of noble metal nanoparticles in dielectric cavities, high-resolution contactless sensing can be achieved while avoiding optical losses in the metal. [1,2] Furthermore, it will be explained how substituting noble metals and standard semiconductors by emergent semi-metal and topological insulator materials enables perfect light trapping tuned from the ultraviolet to the far-infrared in ultra-thin nanocomposite metamaterials for energy conversion applications: photocatalysis, photodetection and thermal emission. [3-6] [1] Baraldi et al., Adv. Mater. Int. 5, 1800241 (2018) [2] Toudert et al., ACS Photon. 2, 1443 (2015) [3] Toudert et al., J. Phys. Chem. C 11, 3511 (2017) [4] Toudert et al., Opt. Mater. Express 7, 2299 (2017) [5] Toudert et al, Opt. Express 26, 34043 (2018) [6] Ghobadi et al., ACS Photon. 5, 4203 (2018)
DescriptionDielectric nanocomposites for energy, environment and health: from fundamental to devices, Laboratoire des Solides Irradiés (LSI) - Ecole polytechnique, Route de Saclay, 91128 Palaiseau Cedex, France,May 27-31, 2019
Appears in Collections:(CFMAC-IO) Comunicaciones congresos
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