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We show that the observed non-monotonic behavior of the thermal conductance between two nanoparticles when they are brought into contact is originated by an intricate phase space dynamics. Here it is assumed that this dynamics results from…

Mesoscale and Nanoscale Physics · Physics 2009-07-27 Agustin Pérez-Madrid , Luciano C. Lapas , J. Miguel Rubí

In recent times the possibility of non-reciprocity in heat transfer between two bodies has been extensively studied. In particular the role of strong magnetic fields has been investigated. A much simpler approach with considerable…

Mesoscale and Nanoscale Physics · Physics 2023-03-29 S. -A. Biehs , G. S. Agarwal

We present a simple model of the interface between a local homogeneous medium and a potentially nonlocal metamaterial/photonic crystal. This model allows us to calculate the scattering matrix elements of the interface for a plane wave of…

Materials Science · Physics 2012-06-18 Chris Fietz , Costas M. Soukoulis

In this Letter a N-body theory for the radiative heat exchange in thermally non equilibrated discrete systems of finite size objects is presented. We report strong exaltation effects of heat flux which can be explained only by taking into…

Mesoscale and Nanoscale Physics · Physics 2015-05-28 Philippe Ben-Abdallah , Svend-Age Biehs , Karl Joulain

We present a theoretical analysis that demonstrates that the far-field radiative heat transfer between objects with dimensions smaller than the thermal wavelength can overcome the Planckian limit by orders of magnitude. We illustrate this…

In this Letter we experimentally demonstrate that the radiative heat transfer between metallic planar surfaces exceeds the blackbody limit by employing the near-field and thin-film effects. Nanosized polystyrene particles were used to…

We report on the experimental observation of the beaming effect in photonic crystals enhanced via surface modes. We experimentally map the spatial field distribution of energy emitted from a subwavelength photonic crystal waveguide into…

Optics · Physics 2009-11-13 Steven K. Morrison , Yuri S. Kivshar

A non-reciprocal phonon model for microwave or optical isolators is considered. It gives a simpler framework to further investigate the formerly argued possibility for a heat transfer between black bodies at common temperatures. While the…

Statistical Mechanics · Physics 2007-05-23 Alejandro Cabo Montes de Oca

The radiation dynamics of a dipole antenna embedded in a Photonic Crystal are modeled by an initially excited harmonic oscillator coupled to a non--Markovian bath of harmonic oscillators representing the colored electromagnetic vacuum…

Classical Physics · Physics 2009-11-06 Kurt Busch , Nipun Vats , Sajeev John , Barry C. Sanders

Light transport in periodic waveguides coupled to a two-level atom is investigated. By using optical Bloch equations and a photonic modal formalism, we derive semi-analytical expressions for the scattering matrix of one atom trapped in a…

Optics · Physics 2015-08-12 Xiaorun Zang , Philippe Lalanne

We discuss the non-radiative heat transfer in non-equilibrium double layer graphene system. We show that at the neutrality point the heat exchange is dominated by the inter-layer plasmon modes and derive analytic expressions for the heat…

Mesoscale and Nanoscale Physics · Physics 2020-11-25 Xuzhe Ying , Alex Kamenev

In nonmetallic crystals, heat is transported by phonons of different frequencies, each contributing differently to the overall heat flux spectrum. In this study, we demonstrate a significant redistribution of heat flux among phonon…

Mesoscale and Nanoscale Physics · Physics 2024-09-23 Haoran Cui , Theodore Maranets , Tengfei Ma , Yan Wang

A tomographic study of near-field radiative heat exchanges between a mesoscopic object and a substrate immersed in a thermal bath is carried out within the theoretical framework of fluctuational electrodynamics. By using the…

Mesoscale and Nanoscale Physics · Physics 2025-01-07 Florian Herz , Riccardo Messina , Philippe Ben-Abdallah

In the classical approach to deal with near-field radiative heat exchanges between two closely spaced bodies no coupling between the different heat carriers inside the materials and thermal photons is usually considered. Here we make an…

Mesoscale and Nanoscale Physics · Physics 2023-05-18 Marta Reina , Chams Gharib Ali Barura , Philippe Ben-Abdallah , Riccardo Messina

We study the radiative heat transfer between a spheroidal metallic nanoparticle and a planar metallic sample for near- and far-field distances. In particular, we investigate the shape dependence of the heat transfer in the near-field…

Mesoscale and Nanoscale Physics · Physics 2015-05-27 Oliver Huth , Felix Rüting , Svend-Age Biehs , Martin Holthaus

In this work, we study the thermalization between two bodies separated by a vacuum gap by coupling the non-Fourier behavior of the materials with the radiative heat transfer in the near-field. Unlike the diffusion-type temperature profile,…

Mesoscale and Nanoscale Physics · Physics 2023-06-06 D. Becerril , A. Camacho de la Rosa , R. Esquivel-Sirvent

A cold, thin film of liquid impinging on an isothermal hot, horizontal surface has been investigated. An approximate solution for the velocity and temperature distributions in the flow along the horizontal surface is developed, which…

Fluid Dynamics · Physics 2014-03-17 Jian-Jun Shu , Graham Wilks

We develop a dynamical theory of heat transfer between two nano systems. In particular, we consider the resonant heat transfer between two nanoparticles due to the coupling of localized surface modes having a finite spectral width. We model…

Mesoscale and Nanoscale Physics · Physics 2013-02-27 Svend-Age Biehs , Girish S. Agarwal

Two metals at different temperatures separated by large gaps exchange heat under the form of electromagnetic radiation. When the separation distance is reduced and they approach contact (nanometer and sub-nanometer gaps), electrons and…

Mesoscale and Nanoscale Physics · Physics 2023-11-20 Mauricio Gómez Viloria , Philippe Ben-Abdallah , Riccardo Messina

We study the influence of the space and time dispersion on the frequency dependence of the wave vectors of electromagnetic waves propagating in three-dimensional photonic crystals. Two types of structures are considered: media with weak…

Other Condensed Matter · Physics 2007-05-23 F. Bass , V. Freilikher , O. Shefranova