An incandescent metasurface for quasimonochromatic polarized Mid-Wave Infrared emission modulated beyond 10 MHz

README

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DESCRIPTION :

This repository contains all datasets and MATLAB codes used in the following paper :

Wojszvzyk, Léo, Anne Nguyen, Anne-Lise Coutrot, Cheng Zhang, Benjamin Vest, et Jean-Jacques Greffet. « An Incandescent Metasurface for Quasimonochromatic Polarized Mid-Wave Infrared Emission Modulated beyond 10 MHz ». Nature Communications 12, n^o 1 (5 mars 2021): 1492. https://doi.org/10.1038/s41467-021-21752-w.

In order to run some of the scripts, users need to download the RETICOLO library available at doi : 10.5281/zenodo.3610175 Light-in-complex-nanostrucutres/RETICOLO and subsequently add this library to their MATLAB search path.

4 folders can be found:

• EM_simulations: contains scripts to reproduce the electromagnetic simulations presented in the paper. The codes use functions in the RETICOLO library (therefore, please make sure that the folder containing all RETICOLO functions (RETICOLO_V8/reticolo_allege) are known to the MATLAB search path).
• PolarizedFreqResponse: contains raw datasets and ready-to-use analysis scripts to reproduce frequency response curves of the device presented in the paper. The main script to be run is "main.m".
• EmissivitySpectra: contains raw datasets and ready-to-use analysis scripts to reproduce the emissivity spectrum of the device presented in the paper.
• Response_to_pulse_simulation: contains raw datasets and ready-to-use analysis scripts to reproduce the pulse response of the device presented in the paper.

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PAPER 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 has 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.