We demonstrate that it is possible to modulate the thermal emission through an electrical modulation of the emissivity. The basic idea is to design a device where absorption is due to a resonant phenomenon. If the resonance can be electrically controlled, then absorption and, therefore, thermal emission can be controlled. We demonstrate this general concept using THz resonant absorption by surface phonon polaritons coupled through a gold grating. In our device, absorption is mostly due to a surface phonon mode confined in a single quantum well (QW). The THz emissivity is electrically controlled by controlling the quantum well refractive index using a gate voltage to modulate the electron density. This paves the way to electrically modulated incandescent sources.
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25 February 2013
Research Article|
March 01 2013
Electrical modulation of emissivity
S. Vassant;
S. Vassant
1
Laboratoire Charles Fabry, Institut d'Optique, CNRS-UMR8501, Université Paris-Sud
, Campus Polytechnique, RD 128, 91127 Palaiseau cedex, France
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I. Moldovan Doyen;
I. Moldovan Doyen
1
Laboratoire Charles Fabry, Institut d'Optique, CNRS-UMR8501, Université Paris-Sud
, Campus Polytechnique, RD 128, 91127 Palaiseau cedex, France
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F. Marquier;
F. Marquier
1
Laboratoire Charles Fabry, Institut d'Optique, CNRS-UMR8501, Université Paris-Sud
, Campus Polytechnique, RD 128, 91127 Palaiseau cedex, France
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F. Pardo;
F. Pardo
2
Laboratoire de Photonique et Nanostructures
, CNRS-UPR20, Route de Nozay, 91460 Marcoussis, France
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U. Gennser;
U. Gennser
2
Laboratoire de Photonique et Nanostructures
, CNRS-UPR20, Route de Nozay, 91460 Marcoussis, France
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A. Cavanna;
A. Cavanna
2
Laboratoire de Photonique et Nanostructures
, CNRS-UPR20, Route de Nozay, 91460 Marcoussis, France
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J. L. Pelouard;
J. L. Pelouard
2
Laboratoire de Photonique et Nanostructures
, CNRS-UPR20, Route de Nozay, 91460 Marcoussis, France
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J. J. Greffet
J. J. Greffet
a)
1
Laboratoire Charles Fabry, Institut d'Optique, CNRS-UMR8501, Université Paris-Sud
, Campus Polytechnique, RD 128, 91127 Palaiseau cedex, France
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S. Vassant
1
I. Moldovan Doyen
1
F. Marquier
1
F. Pardo
2
U. Gennser
2
A. Cavanna
2
J. L. Pelouard
2
J. J. Greffet
1,a)
1
Laboratoire Charles Fabry, Institut d'Optique, CNRS-UMR8501, Université Paris-Sud
, Campus Polytechnique, RD 128, 91127 Palaiseau cedex, France
2
Laboratoire de Photonique et Nanostructures
, CNRS-UPR20, Route de Nozay, 91460 Marcoussis, France
a)
Author to whom correspondence should be addressed. Electronic address: [email protected].
Appl. Phys. Lett. 102, 081125 (2013)
Article history
Received:
October 15 2012
Accepted:
February 13 2013
Citation
S. Vassant, I. Moldovan Doyen, F. Marquier, F. Pardo, U. Gennser, A. Cavanna, J. L. Pelouard, J. J. Greffet; Electrical modulation of emissivity. Appl. Phys. Lett. 25 February 2013; 102 (8): 081125. https://doi.org/10.1063/1.4793650
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