Julien Legendre

Chercheur postdoctoral à l'ICFO - l'Institut des Sciences Photoniques
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Publications

Performances of far- and near-field thermophotonic refrigeration devices from the detailed-balance approach

Thomas Châtelet , Julien Legendre , Olivier Merchiers , Pierre-Olivier Chapuis

Journal of Applied Physics, 2025, 138 (17), ⟨10.1063/5.0274193⟩

Article dans une revue hal-05357631v1
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Energy-efficient thermally smart windows with tunable properties across the near- and mid-infrared ranges

Julien Legendre , Georgia T. Papadakis

Nanophotonics, 2025, ⟨10.1515/nanoph-2025-0219⟩

Article dans une revue hal-05066148v2
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CRESCENT-1D: A 1D solver of coupled charge and light transport in heterostructures for the design of near-field thermophotonic engines

Julien Legendre , Pierre-Olivier Chapuis

IEEE Transactions on Electron Devices, 2025, 72 (3), pp.1211-1220. ⟨10.1109/TED.2025.3528870⟩

Article dans une revue hal-04749430v3
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Operating conditions and thermodynamic bounds of dual radiative heat engines

Julien Legendre , Pierre-Olivier Chapuis

Physical Review Applied, 2025, 23 (3), pp.034023. ⟨10.1103/PhysRevApplied.23.034023⟩

Article dans une revue hal-04450129v3
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GaAs-Based Near-Field Thermophotonic Devices: Approaching The Idealized Case With One-Dimensional PN Junctions

Julien Legendre , Pierre-Olivier Chapuis

Solar Energy Materials and Solar Cells, 2022, 238, pp.111594. ⟨10.1016/j.solmat.2022.111594⟩

Article dans une revue hal-03294468v3
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Overcoming non-radiative losses with AlGaAs PIN junctions for near-field thermophotonic energy harvesting

Julien Legendre , Pierre-Olivier Chapuis

Applied Physics Letters, 2022, ⟨10.1063/5.0116662⟩

Article dans une revue hal-03740597v4

Thermophotonic cooling

Thomas Châtelet , Julien Legendre , Olivier Merchiers , Pierre-Olivier Chapuis

Workshop on Thermal Radiation to Electrical Energy conversion (TREE), May 2025, Villeurbanne (Lyon), France

Communication dans un congrès hal-05407212v1

Electroluminescence and thermophotovoltaics as key elements of radiative heat engines

Thomas Châtelet , Julien Legendre , Olivier Merchiers , Pierre-Olivier Chapuis

Optica Advanced Photonics Congress – SOLITH session, Jul 2025, Marseille, France

Communication dans un congrès hal-05407143v1

Near-field optoelectronic heat engines and thermal emission of subwavelength objects

Julien Legendre , Thomas Châtelet , Kyriaki Kontou , Jose Manuel Sojo Gordillo , Ahmed Alwakil et al.

15th international conference on Metamaterials, Photonic Crystals and Plasmonics (META), Jul 2025, Malaga, Spain

Communication dans un congrès hal-05347646v1

Nanoscale thermal radiation including sub-wavelength emitters; application to energy-conversion devices

Julien Legendre , Mathieu Thomas , Thomas Châtelet , Arlea Koskenniemi , Basile Roux et al.

Workshop on Casimir forces and nanoscale heat transfer, Jul 2025, Bad Zwischenahn, Germany

Communication dans un congrès hal-05347648v1

Phonon polaritons and their impact on energy harvesting and cooling technologies

Thomas Châtelet , Julien Legendre , Kyriaki Kontou , Wissal Sghaier , Pierre-Olivier Chapuis et al.

Thermal Polaritonics Workshop, LEE Bong Jae, Apr 2025, Daejeon, South Korea

Communication dans un congrès hal-05042794v1

Thermal radiation at the nanoscale, electroluminescence, single and dual radiative heat engines

Julien Legendre , Thomas Châtelet , Mathieu Thomas , Olivier Merchiers , Pierre-Olivier Chapuis

14th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META 2024), PIERS, Jul 2024, Toyama, Japan

Communication dans un congrès hal-04792439v1

Near-field thermophotonic refrigeration

T. Châtelet , J. Legendre , P.-O. Chapuis , O. Merchiers

5th International Workshop on Nano-Micro Thermal Radiation (NanoRad 2024), Jul 2024, Sapporo, Japan

Communication dans un congrès hal-04803804v1

Dual radiative heat engines: combining a TPV cell with an active emitter

Julien Legendre , Pierre-Olivier Chapuis

15th World Conference on Thermophotovoltaic Generation of Electricity (TPV-15), Oct 2024, Madrid, Spain

Communication dans un congrès hal-04803792v1

Design of a near-field thermophotonic device in the planar configuration for energy harvesting and refrigeration

Wissal Sghaier , Julien Legendre , Luc van der Kraabe , Natasha Gruginskie , John Schermer et al.

Thermal Radiation to Electrical Energy conversion (TREE) workshop, Oct 2023, Nantes, France

Communication dans un congrès hal-04311006v1

Comparing near-field thermal radiation of different materials including III-V semiconductors

Mathieu Thomas , Christophe Lucchesi , Julien Legendre , Natasha Gruginskie , Rodolphe Vaillon et al.

MRS Spring Meeting Symposium "Emerging Thermal Materials—From Nanoscale Heat Transport, Devices and Applications, to Theories", Apr 2023, San Francisco, United States

Communication dans un congrès hal-04310988v1

Thermophotonic energy harvesting: towards a narrowband LED emission?

Julien Legendre , Pierre-Olivier Chapuis

Symposium SF05: Infrared materials and devices for thermal radiation control, MRS Fall Symposium, Nov 2023, Boston, United States

Communication dans un congrès hal-04803815v1

Thermophotovoltaics vs thermophotonics: physics and performance of III-V heterostructures in the near-field

Julien Legendre , Pierre-Olivier Chapuis

14th World Conference on Thermophotovoltaic Generation, May 2023, online, France

Communication dans un congrès hal-04115996v1

Near-field thermal radiation, thermophotovoltaics and polaritons

Christophe Lucchesi , Julien Legendre , Thomas Châtelet , Dilek Cakiroglu , Jean-Philippe Perez et al.

Thermal Polaritonics Workshop, Apr 2023, Tokyo, France

Communication dans un congrès hal-04310983v1

Near-field thermophotonic energy harvesting from heterostructure-based devices with bandgaps in the near-infrared range

Julien Legendre , Pierre-Olivier Chapuis

CMD30 - FisMat2023, Sep 2023, Milano, Italy

Communication dans un congrès hal-04232675v1

Thermodynamics of AlGaAs near-field thermophotonic devices for energy harvesting and cooling purposes

Julien Legendre , Thomas Châtelet , Olivier Merchiers , Pierre-Olivier Chapuis

Photonics West 2023 - Photonic Heat Engines: Science and Applications V, Feb 2023, San Francisco, United States

Communication dans un congrès hal-03979096v1

Near-Field Radiative Enhancements — Benefits and Drawbacks for Thermophotonic Energy Harvesting

Julien Legendre , Pierre-Olivier Chapuis

MRS Spring 2023, Apr 2023, Online, France

Communication dans un congrès hal-04084792v1

Electroluminescence overcoming thermal radiation in near field: conditions for a nanothermophotonic refrigerator

Thomas Châtelet , Julien Legendre , Olivier Merchiers , Pierre-Olivier Chapuis

Workshop on Thermal Radiation to Electrical Energy conversion, Oct 2023, Nantes, France

Communication dans un congrès hal-04311004v1

Thermal Radiation, Electroluminescence and Heat Engines in the Near Field

Julien Legendre , Thomas Chatelet , Mathieu Thomas , Christophe Lucchesi , Olivier Merchiers et al.

Progress In Electromagnetrics Symposium (PIERS) 2023 - Focus Session «Casimir Effect and Radiative Heat Transfer», Jul 2023, Prague, Czech Republic

Communication dans un congrès hal-04310856v1

Near-field thermal radiation vs near-field electroluminescence: conditions for a thermophotonic refrigerator,

Thomas Chatelet , Julien Legendre , Pierre-Olivier Chapuis , Olivier Merchiers

MRS Spring Meeting Symposium, "Emerging Thermal Materials—From Nanoscale Heat Transport, Devices and Applications, to Theories", Apr 2023, San Francisco, United States

Communication dans un congrès hal-04310989v1

A study of AlGaAs PIN homojunctions for near-field thermophotonic applications

Julien Legendre , Pierre-Olivier Chapuis

Photonics West 2023 - Physics, Simulation, and Photonic Engineering of Photovoltaic Devices XII, Jan 2023, San Francisco, United States

Communication dans un congrès hal-03979072v1

Thermophotonic energy harvesters: thermodynamic analysis and near-field performances of 1D architectures

Julien Legendre , Pierre-Olivier Chapuis

Workshop on Thermal Radiation to Electrical Energy conversion, Oct 2023, Nantes, France

Communication dans un congrès hal-04238299v1

Controlling near-field thermal energy for conversion devices and sensing

Christophe Lucchesi , Julien Legendre , Khac-Long Nguyen , Ahmed Alwakil , Dilek Cakiroglu et al.

Program on Emerging Regimes and Implications of Quantum and Thermal Fluctuational Electrodynamics (Flectro2022), Kavli Institute of Theoretical Physics (KITP), Jul 2022, UC Santa Barbara, United States. ⟨10.26081/K6R93X⟩

Communication dans un congrès hal-03813941v1

Near-field thermophotonics: extending near-field thermophotovoltaics with LEDs as emitters

Julien Legendre , Pierre-Olivier Chapuis

Workshop on Thermal Radiation to Electrical Energy conversion, Nov 2022, Noisy-le-Grand, France

Communication dans un congrès hal-03858069v1

Near-field thermophotonic devices with AlGaAs emitters and cells

Julien Legendre , Pierre-Olivier Chapuis

13rd World Conference on Thermophotovoltaic Generation of Electricity, Apr 2022, Miyazaki (remote), Japan

Communication dans un congrès hal-03653400v1

A Study of AlGaAs-Based Near-Field Thermophotonic Devices

Julien Legendre , Pierre-Olivier Chapuis

Nanoscale and Microscale Heat Transfer VII, May 2022, Palermo, Italy

Communication dans un congrès hal-03710909v1

Temperature dependence of thermal radiation and impact on near-field thermophotovoltaic devices

Christophe Lucchesi , Julien Legendre , Rodolphe Vaillon , Pierre-Olivier Chapuis

13th Conference on Thermophotovoltaic Generation of Electricity (TPV-13), Apr 2022, Miyazaki & online (hybrid), Japan

Communication dans un congrès hal-03673063v1

Near-field radiative heat transfer in thermophotovoltaics and thermophotonics

Christophe Lucchesi , Julien Legendre , Pierre-Olivier Chapuis , Mathieu Thomas , Maud Piqueras et al.

745th WE-Heraeus-Seminar “Photon, Phonon, and Electron Transitions in Coupled Nanoscale Systems”, Sep 2022, Bad Honnef, Germany

Communication dans un congrès hal-03862809v1

Impact of non-radiative losses in AlGaAs PIN junctions for near-field thermophotonic energy harvesting

Julien Legendre , Pierre-Olivier Chapuis

Journées Plénières du Groupe de Recherche NAME (NAnoMaterials for Energy applications), Oct 2022, Villeurbanne, France

Communication dans un congrès hal-03817423v1

Solid-state/optical alternatives to thermoelectricity for thermal-to-electrical energy conversion

Christophe Lucchesi , Julien Legendre , Dilek Cakiroglu , Jean-Philippe Perez , Thierry Taliercio et al.

18th European Conference on Thermoelectrics (ECT), Oct 2022, Barcelona, Spain

Communication dans un congrès hal-03813779v1

A numerical study of near-field thermophotonic devices including local emission and absorption distributions

Julien Legendre , Pierre-Olivier Chapuis

MRS Spring meeting, Symposium "Advanced functional, linear/nonlinear and quantum materials for metasurfaces, metamaterials and nanophotonics, Apr 2021, Seattle (remote), France

Communication dans un congrès hal-03649747v1

A numerical study of near-field thermophotonic devices including local emission and absorption distribution

Julien Legendre , Pierre-Olivier Chapuis

E-MRS Spring meeting, symposium 'Advances in thermophotovoltaic devices, devices and systems', May 2021, Strasbourg (remote), France

Communication dans un congrès hal-03649746v1

A radiative thermal device for refrigeration: the near-field thermophonic cooler

Thomas Châtelet , Julien Legendre , Pierre-Olivier Chapuis , Olivier Merchiers

15th World Conference on Thermophotovoltaic Generation of Electricity (TPV-15), Oct 2024, Madrid, Spain

Poster de conférence hal-04803789v1

Operating conditions and thermodynamic bounds of dual radiative heat engines

Julien Legendre , Pierre-Olivier Chapuis

Sadi-Carnot's legacy - Celebrating the 200th anniversary of thermodynamics, Sep 2024, Palaiseau, France

Poster de conférence hal-04803819v1

Impact of roughness on the energy harvesting in thermophotonic devices

Thomas Châtelet , Julien Legendre , Pierre-Olivier Chapuis , Olivier Merchiers

14th Conference on Thermophotovoltaic Generation of Electricity (TPV-14), May 2023, online (organized by Univ. Michigan), United States

Poster de conférence hal-04310990v1

Near-field thermophotonics: a numerical study of AlGaAs-GaAs devices

Julien Legendre , Pierre-Olivier Chapuis

1st summer school on the modeling of nanomaterials for energy transport and storage (MONACOSTE), May 2022, Fréjus, France

Poster de conférence hal-03669323v1

Near-field thermophotonic refrigerator: a numerical study

Thomas Châtelet , Julien Legendre , Pierre-Olivier Chapuis , Olivier Merchiers

Journées de la Matière Condensée (JMC) 2022, Aug 2022, Villeurbanne, France

Poster de conférence hal-03863689v1

Photonic heat pumps instead of heat engines: the near-field thermophotonic refrigerator

Thomas Châtelet , Julien Legendre , Pierre-Olivier Chapuis , Olivier Merchiers

Workshop on Thermal Radiation to electrical Energy conversion (TREE), Nov 2022, Champ-sur-Marne, France

Poster de conférence hal-03863588v1

Near-field thermophotonics: a numerical study of AlGaAs-GaAs devices

Julien Legendre , Pierre-Olivier Chapuis

Journées de la Matière Condensée (JMC) 2022, Aug 2022, Lyon, France

Poster de conférence hal-03780123v1

Near-field thermophotonics: a numerical study of AlGaAs-GaAs devices

Julien Legendre , Pierre-Olivier Chapuis

3rd Photovoltaic School (PVSchool 2022), Apr 2022, Les Houches, France

Poster de conférence hal-03649753v1

Near-field thermophotonic refrigerator: a numerical study

Thomas Chatelet , Julien Legendre , Pierre-Olivier Chapuis , Olivier Merchiers

Journées plénières du GDR Nanomaterials for Energy, Oct 2022, Villeurbanne, France

Poster de conférence hal-03863637v1

Near-field thermophotonic devices with AlGaAs emitters and cells

Julien Legendre , Pierre-Olivier Chapuis

MRS Fall meeting, Nov 2021, Boston, United States

Poster de conférence hal-03649745v1

A numerical study of near-field thermophotonic devices

Julien Legendre , Pierre-Olivier Chapuis

2nd summer school on Photothermal effects in Plasmonics (PEP), Oct 2021, Porquerolles, France

Poster de conférence hal-03649754v1