An incandescent metasurface for quasimonochromatic polarized mid-wave infrared emission modulated beyond 10 MHz

Léo Wojszvzyk, Anne Nguyen, Anne-Lise Coutrot, Cheng Zhang, Benjamin Vest and Jean-Jacques Greffet ()
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Léo Wojszvzyk: Université Paris-Saclay, Institut d’Optique Graduate School, CNRS, Laboratoire Charles Fabry
Anne Nguyen: Université Paris-Saclay, Institut d’Optique Graduate School, CNRS, Laboratoire Charles Fabry
Anne-Lise Coutrot: Université Paris-Saclay, Institut d’Optique Graduate School, CNRS, Laboratoire Charles Fabry
Cheng Zhang: Université Paris-Saclay, Institut d’Optique Graduate School, CNRS, Laboratoire Charles Fabry
Benjamin Vest: Université Paris-Saclay, Institut d’Optique Graduate School, CNRS, Laboratoire Charles Fabry
Jean-Jacques Greffet: Université Paris-Saclay, Institut d’Optique Graduate School, CNRS, Laboratoire Charles Fabry

Nature Communications, 2021, vol. 12, issue 1, 1-8

Abstract: Abstract Incandescent sources such as hot membranes and globars are widely used for mid-infrared spectroscopic applications. The emission properties of these sources can be tailored by means of resonant metasurfaces: control of the spectrum, polarization, and directivity have been reported. For detection or communication applications, fast temperature modulation is desirable but is still a challenge due to thermal inertia. Reducing thermal inertia can be achieved using nanoscale structures at the expense of a low absorption and emission cross-section. Here, we introduce a metasurface that combines nanoscale heaters to ensure fast thermal response and nanophotonic resonances to provide large monochromatic and polarized emissivity. The metasurface is based on platinum and silicon nitride and can sustain high temperatures. We report a peak emissivity of 0.8 and an operation up to 20 MHz, six orders of magnitude faster than commercially available hot membranes.

Date: 2021
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DOI: 10.1038/s41467-021-21752-w

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