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Highly Efficient Surface Plasmon Launching and Decoupling
Auteur(s): Baron Alexandre, Devaux Eloïse, Rodier Jean-Claude, Hugonin Jean-Paul, Rousseau E., Genet Cyriaque, Ebbesen Thomas, Lalanne Philippe
Conference: 3rd International Conference on Metamaterials, Photonic Crystals and Plasmonics (Meta'12) (Paris, FR, 2012-04-19)
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Detection of a Biexciton in Semiconducting Carbon Nanotubes Using Nonlinear Optical Spectroscopy
Auteur(s): Colombier L., Selles J., Rousseau E., Lauret Jean‐sébastien, Vialla Fabien, Voisin Christophe, Cassabois G.
(Article) Publié:
Physical Review Letters, vol. 109 p.197402 (2012)
Texte intégral en Openaccess :
Ref HAL: hal-00750969_v1
DOI: 10.1103/PhysRevLett.109.197402
WoS: 000310852000027
Exporter : BibTex | endNote
28 Citations
Résumé: We report the observation of the biexciton in semiconducting single-wall carbon nanotubes by means of nonlinear optical spectroscopy. Our measurements reveal the universal asymmetric line shape of the Fano resonance intrinsic to the biexciton transition. For nanotubes of the (9,7) chirality, we find a biexciton binding energy of 106 meV. From the calculation of the χ(3) nonlinear response, we provide a quantitative interpretation of our measurements, leading to an estimation of the characteristic Fano factor q of 7±3. This value allows us to extract the first experimental information on the biexciton stability and we obtain a biexciton annihilation rate comparable to the exciton-exciton annihilation one.
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Asymptotic expressions describing radiative heat transfer between polar materials from the far-field regime to the nanoscale regime
Auteur(s): Rousseau E., Laroche Marine, Greffet Jean-Jacques
(Article) Publié:
Journal Of Applied Physics, vol. 111 p.014311 (2012)
Texte intégral en Openaccess :
Ref HAL: hal-00743615_v1
DOI: 10.1063/1.3672809
WoS: 000299127200099
Exporter : BibTex | endNote
20 Citations
Résumé: Heat transfer between two plates of polar materials at nanoscale distance is known to be enhanced by several orders of magnitude as compared with its far-field value. In this article, we derive accu- rate analytical expressions to quantitatively predict heat fluxes in the near-field. These analytical expressions reveal the physical mechanisms responsible for the enhancement. For two dielectric polar materials and for gaps smaller than 75nm at room temperature the heat transfer is dominated by the surface phonon polariton contribution. Between 75nm and 500 nm, the enhancement is mostly due to frustrated total internal reflection. The paper reports accurate analytical expressions for both contributions. Our analytical results highlight two differences between radiation flux at the nanoscale and in the far field: i)the heat flux spectrum depends on the gap distance, ii) the temperature dependence of the heat transfer coefficient deviates strongly from the T3 law valid for gray bodies in the far-field
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Compact Antenna for Efficient and Unidirectional Launching and Decoupling of Surface Plasmons
Auteur(s): Baron Alexandre, Devaux Eloïse, Rodier Jean-Claude, Hugonin Jean-Paul, Rousseau E., Genet Cyriaque, Ebbesen Thomas, Lalanne Philippe
(Article) Publié:
Nano Letters, vol. 11 p.4207 (2011)
Texte intégral en Openaccess :
Ref HAL: hal-00675332_v1
PMID 21905740
DOI: 10.1021/nl202135w
WoS: 000295667000030
Exporter : BibTex | endNote
152 Citations
Résumé: Controlling the launching efficiencies and the directionality of surface plasmon polaritons (SPPs) and their decoupling to freely propagating light is a major goal for the development of plasmonic devices and systems. Here, we report on the design and experimental observation of a highly efficient unidirectional surface plasmon launcher composed of eleven subwavelength grooves, each with a distinct depth and width. Our observations show that, under normal illumination by a focused Gaussian beam, unidirectional SPP launching with an efficiency of at least 52% is achieved experimentally with a compact device of total length smaller than 8 μm. Reciprocally, we report that the same device can efficiently convert SPPs into a highly directive light beam emanating perpendicularly to the sample.
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Engineering radiative heat transfer at the nanoscale using surface waves.
Auteur(s): Rousseau E.
Conférence invité: International NanoOptoElectronic Workshop (, RU, 2011-07-24)
Résumé: This talk will present the physics of the heat transfer at the nanoscale. Experimental realizations and measurements such as coherent emission from thermal sources and radiative heat transfer enhancement will be presented.
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A quantitative measurement of radiative heat transfer
due to evanescent waves
Auteur(s): Rousseau E.
Conférence invité: Physics of Light Matter Coupling in Nanostructures (, DE, 2011-04-04)
Résumé: It has been predicted theoretically that for distances smaller than the peak wavelength of the blackbody spectrum, radiative heat transfer can be increased by the contribution of evanescent waves [1]. These effects have already been observed but a quantitative comparison is still missing.
We measure the heat flux between a sphere and a plate as a function of the sphere-plate distance. We find a good agreement between the experimental and theoretical results . Particularly, the distance dependence is well reproduced by the theory in a large range of gap widths: 50nm-2μm.
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Plasmonic resonators as optical antenna for single photon sources
Auteur(s): Marquier François, Rousseau E., Vassant Simon, Archambault Alexandre, Esteban Ruben, Teperik Tatiana, Greffet Jean-Jacques
Conference: Gordon Conference on Plasmonics (Waterville, US, 2010-06-13)
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