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4 results for “incandescence”
An incandescent metasurface for quasimonochromatic polarized Mid-Wave Infrared emission modulated beyond 10 MHz
<p>README :</p> <p>The codes available in this repository are MATLAB scripts.</p> <p>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.</p> <p>4 folders can be found:</p> <ul> <li>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 are known to the MATLAB search path).</li> <li>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".</li> <li>EmissivitySpectra: contains raw datasets and ready-to-use analysis scripts to reproduce the emissivity spectrum of the device presented in the paper.</li> <li>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.</li> </ul> <p>===============================</p> <p>DESCRIPTION :</p> <p>This repository contains all datasets and codes used in the following paper :</p> <p>doi :</p> <p>===============================</p> <p>PAPER ABSTRACT:</p> <p>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.</p>
An incandescent metasurface for quasimonochromatic polarized Mid-Wave Infrared emission modulated beyond 10 MHz
<p>README</p> <p>===============================</p> <p>DESCRIPTION :</p> <p>This repository contains all datasets and MATLAB codes used in the following paper :</p> <p>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 ». <em>Nature Communications</em> 12, n<sup>o</sup> 1 (5 mars 2021): 1492. <a href="https://doi.org/10.1038/s41467-021-21752-w">https://doi.org/10.1038/s41467-021-21752-w</a>.</p> <p>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.</p> <p>4 folders can be found:</p> <ul> <li>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).</li> <li>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".</li> <li>EmissivitySpectra: contains raw datasets and ready-to-use analysis scripts to reproduce the emissivity spectrum of the device presented in the paper.</li> <li>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.</li> </ul> <p>===============================</p> <p>PAPER ABSTRACT:</p> <p>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.</p>
Large circular dichroism in the emission from an incandescent metasurface
<p>DESCRIPTION :</p> <p>This repository contains all datasets and MATLAB codes used in the following paper :</p> <p>Large circular dichroism in the emission from an incandescent metasurface, Optica 2023.</p> <p>===============================</p> <p>PAPER ABSTRACT:</p> <p>Compact sources in the mid-wave infrared (MWIR) are needed for several applications ranging from spectroscopy to free-space communication. Ultra-thin incandescent metasurfaces are promising candidates, offering the possibility of tuning the emission spectrum, directivity and modulation speed. However, control over polarization remains a challenge, especially when it comes to emission of circularly polarized light.<br> Here, emission of polarized MWIR radiation by a 700 nm thick incandescent chiral metasurface is reported. The degree of polarization is above 0.5 with degree of circular polarization of 0.38 at 5 µm. The metasurface is heated by Joule effect and its emission can be modulated beyond 10 MHz. This paves the way to detection techniques using polarization as an additional degree of freedom.</p>
Large circular dichroism in the emission from an incandescent metasurface
<p>DESCRIPTION :</p> <p>This repository contains experimental datasets (measured emission spectra) and corresponding processing scripts (Matlab) used in the following paper :</p> <p>Large circular dichroism in the emission from an incandescent metasurface, Optica 2023.</p> <p>===============================</p> <p>PAPER ABSTRACT:</p> <p>Compact sources in the mid-wave infrared (MWIR) are needed for several applications ranging from spectroscopy to free-space communication. Ultra-thin incandescent metasurfaces are promising candidates, offering the possibility of tuning the emission spectrum, directivity and modulation speed. However, control over polarization remains a challenge, especially when it comes to emission of circularly polarized light.<br> Here, emission of polarized MWIR radiation by a 700 nm thick incandescent chiral metasurface is reported. The degree of polarization is above 0.5 with degree of circular polarization of 0.38 at 5 µm. The metasurface is heated by Joule effect and its emission can be modulated beyond 10 MHz. This paves the way to detection techniques using polarization as an additional degree of freedom.</p>
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