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Theses

Rôle des ondes de surface dans la modification des propriétés radiatives de matériaux microstructurés. Application à la conception de sources infrarouges et à l'effet thermophotovoltaïque.

Abstract : The existence of surface waves on materials like metals, doped semiconductors, polar materials or photonic crystals modifies their radiative properties.
The 1st part of this thesis deals with the coherent and amplified thermal emission by surface plasmon-polaritons. We have designed and fabricated a highly directional tungsten thermal source in the near infrared. We have also studied the radiative cooling of doped silicon thanks to the amplified thermal emission by surface plasmons. We have compared the efficiencies of those coherent sources with the one of an anti-reflective system : the Salisbury screen.
In the 2nd part, we study the impact of the near-field radiative transfer on thermophotovoltaic (TPV) energy conversion. The resonant excitation of surface waves on the thermal source illuminating the TPV cell generates an amplified and quasi-monochromatic radiative transfer. We propose a quantitative model of the calculation of the photogeneration current and the efficiency. We show a significant enhancement of both the efficiency and the output electric power of a near-field TPV converter.
The 3rd part is dedicated to the radiative properties of photonic crystals induced by surface waves. Two phenomena known in plasmonics have been obtained : the resonant transmission through an opaque film and the coherent thermal emission. A key advantage of photonic crystals is that the resonant frequency can be modified by changing the lattice parameters.
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https://tel.archives-ouvertes.fr/tel-00011615
Contributor : Marine Laroche <>
Submitted on : Wednesday, February 15, 2006 - 11:49:33 AM
Last modification on : Friday, July 3, 2020 - 9:28:03 AM
Long-term archiving on: : Monday, September 17, 2012 - 12:01:29 PM

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  • HAL Id : tel-00011615, version 1

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Marine Laroche. Rôle des ondes de surface dans la modification des propriétés radiatives de matériaux microstructurés. Application à la conception de sources infrarouges et à l'effet thermophotovoltaïque.. Physique [physics]. Ecole Centrale Paris, 2005. Français. ⟨tel-00011615⟩

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