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Tailoring thermal emission with incandescent metasurfaces

Tailoring thermal emission

Infrared thermal sources...faster than LEDs !

During the last decades, various research groups have managed to design and fabricate devices based on thermal emission providing light with controlled angular distribution, narrow band spectrum, or easily modulable at high frequencies. This is generally done by heating the integrality of the emitting device or by modulating at high speed the emissivity of the active material.

In our team, we adopted a different approach ; the incandescent emitters we chose, are really tiny : they are nano-emitters. When placed on an adequate substrate , they can cool down within tens of nanoseconds, thanks to their small thickness. However, such qmall pieces of matter cannot emit much light when heated. To compensate this rather small intrinsic emission, we design, fabricate and characterize architectures of nanodevices by following the principles of the local formulation of the Kirchhoff's law. In other words, we design structures that maxumize light absorption. This enables us reciprocally to identify structures benefiting from interesting antenna effects, potentially enhancing the total emission by several orders of magnitude.


Phd students and postdocs, CURRENT AND FORMER MEMBERS OF THE PROJECT
Anne Nguyen

Anne Nguyen

PhD student 2022

Anne defended her thesis on December 1st 2022 and joined the DGA

 

Leo Wojszvzyk

Dr. Léo Wojszvzyk

 PhD Student 2019

Léo defended his thesis in 2019 and joined the DGA. His thesis title :

"Fast modulation of infrared emission by incandescent metasurfaces"

 

RELATED PUBLICATIONS

Large circular dichroism in the emission from an incandescent metasurface

Authors : Anne Nguyen, Jean-Paul Hugonin, Anne-Lise Coutrot, Enrique Garcia-Caurel, Benjamin Vest, and Jean-Jacques Greffet

DOI : https://doi.org/10.1364/OPTICA.480292

Optica Vol. 10, Issue 2,pp. 232-238 (2023)

Efficiency optimization of mid-infrared incandescent sources with time-varying temperature

Authors : Anne Nguyen, Jean-Jacques Greffet

DOI : https://doi.org/10.1364/OME.443129

Opt. Mat. Express  12, 225 (2022)