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Temperature-dependent and optimized thermal emission by spheres
- Source :
- Applied Physics Letters, Applied Physics Letters, American Institute of Physics, 2018, 112 (11), ⟨10.1063/1.5010426⟩
- Publication Year :
- 2018
- Publisher :
- HAL CCSD, 2018.
-
Abstract
- We investigate the temperature and size dependencies of thermal emission by homogeneous spheres as a function of their dielectric properties. Different power laws obtained in this work show that the emitted power can depart strongly from the usual fourth power of temperature given by Planck's law and from the square or the cube of the radius. We also show how to optimize the thermal emission by selecting permittivities leading to resonances, which allow for the so-called super-Planckian regime. These results will be useful as spheres, i.e. the simplest finite objects, are often considered as building blocks of more complex objects.
- Subjects :
- Physics
Work (thermodynamics)
010504 meteorology & atmospheric sciences
Physics and Astronomy (miscellaneous)
Fourth power
Radius
Dielectric
01 natural sciences
Power law
Square (algebra)
Computational physics
[SPI.ELEC]Engineering Sciences [physics]/Electromagnetism
0103 physical sciences
Emissivity
[SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic
SPHERES
010306 general physics
ComputingMilieux_MISCELLANEOUS
0105 earth and related environmental sciences
Subjects
Details
- Language :
- English
- ISSN :
- 00036951
- Database :
- OpenAIRE
- Journal :
- Applied Physics Letters, Applied Physics Letters, American Institute of Physics, 2018, 112 (11), ⟨10.1063/1.5010426⟩
- Accession number :
- edsair.doi.dedup.....509343c958f0d7c0815b4af950fce4ba
- Full Text :
- https://doi.org/10.1063/1.5010426⟩