260 research outputs found
Thermal photon drag in many-body systems
We demonstrate the existence of a thermal analog of Coulomb drag in many-body
systems which is driven by thermal photons. We show that this frictional effect
can either be positive or negative depending on the separation distances within
the system. Also we highlight that the persistent heat currents flowing in
non-reciprocal systems at equilibrium are subject to this effect and the latter
can even amplify these flows
Thermal memristor and neuromorphic networks for manipulating heat flow
A memristor is one of four fundamental two-terminal solid elements in
electronics. In addition with the resistor, the capacitor and the inductor,
this passive element relates the electric charges to current in solid state
elements. Here we report the existence of a thermal analog for this element
made with metal-insulator transition materials. We demonstrate that these
memristive systems can be used to create thermal neurons opening so the way to
neuromophic networks for smart thermal management and information treatment
Contactless heat flux control with photonic devices
The ability to control electric currents in solids using diodes and
transistors is undoubtedly at the origin of the main developments in modern
electronics which have revolutionized the daily life in the second half of 20th
century. Surprisingly, until the year 2000 no thermal counterpart for such a
control had been proposed. Since then, based on pioneering works on the control
of phononic heat currents new devices were proposed which allow for the control
of heat fluxes carried by photons rather than phonons or electrons. The goal of
the present paper is to summarize the main advances achieved recently in the
field of thermal energy control with photons.Comment: Invited Revie
On Super-Planckian thermal emission in far field regime
We study, in the framework of the Landauer theory, the thermal emission in
far-field regime, of arbitrary indefinite planar media and finite size systems.
We prove that the flux radiated by the former is bounded by the blackbody
emission while, for the second, there is in principle, no upper limit
demonstrating so the possibility for a super-Planckian thermal emission with
finite size systems
Thermotronics: toward nanocircuits to manage radiative heat flux
The control of electric currents in solids is at the origin of the modern
electronics revolution which has driven our daily life since the second half of
20th century. Surprisingly, to date, there is no thermal analog for a control
of heat flux. Here, we summarize the very last developments carried out in this
direction to control heat exchanges by radiation both in near and far-field in
complex architecture networks.Comment: arXiv admin note: text overlap with arXiv:1503.0498
Control of the local photonic density of states above magneto-optical metamaterials
The local density of states (LDOS) of electromagnetic field drives many basic
processes associated to light-matter interaction such as the thermal emission
of object, the spontaneous emission of quantum systems or the
fluctuation-induced electromagnetic forces on molecules. Here, we study the
LDOS in the close vincinity of magneto-optical metamaterials under the action
of an external magnetic field and demonstrate that it can be efficiently
changed over a broad or narrow spectral range simply by changing the spatial
orientation or the magnitude of this field. This result paves the way for an
active control of the photonic density of states at deep-subwavelength scale
Heat Transfer Through Near-Field Interactions in Nanofluids
Using the Landauer-Buttiker theory we calculate the thermal conductance
associated to plasmons modes in one dimensional arrays of nanoparticles closely
spaced in a host fluid. Our numerical simulations show that the near-field
interactions between particles have a negligible effect on the thermal
conductivity of nanoparticles colloidal solutions (nanofluids)
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