I. <i>On the relation between the radiating and absorbing powers of different bodies for light and heat</i>

Kirchhoff, G.

doi:10.1080/14786446008642901

Cited by 155 publications

(70 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2 suggest that they should also emit radiation at the same THz frequencies when heated based on Kirchhoff's law [28]. The emission spectra of the three samples at 400 °C were measured using the same FTIR spectrometer by directing the emitted radiation to its external port.…”

Section: Resultsmentioning

confidence: 99%

Narrowband terahertz emitters using metamaterial films

Alves¹,

Kearney²,

Grbovic³

et al. 2012

Opt. Express

View full text Add to dashboard Cite

Abstract:In this article we report on metamaterial-based narrowband thermal terahertz (THz) emitters with a bandwidth of about 1 THz. Single band emitters designed to radiate in the 4 to 8 THz range were found to emit as high as 36 W/m 2 when operated at 400 °C. Emission into two wellseparated THz bands was also demonstrated by using metamaterial structures featuring more complex unit cells. Imaging of heated emitters using a microbolometer camera fitted with THz optics clearly showed the expected higher emissivity from the metamaterial structure compared to low-emissivity of the surrounding aluminum.

show abstract

Section: Resultsmentioning

confidence: 99%

Narrowband terahertz emitters using metamaterial films

Alves¹,

Kearney²,

Grbovic³

et al. 2012

Opt. Express

View full text Add to dashboard Cite

show abstract

“…[29] and a very effective source operating up to 600 kHz has been reported [30]. All these developments can be analyzed using Kirchhoff law [31], which expresses the equality of absorptivity and emissivity. This law is valid provided that the emitter is in local thermodynamic equilibrium at a uniform temperature T and provided that the emitting medium is reciprocal.…”

Section: Introductionmentioning

confidence: 99%

Light Emission by Nonequilibrium Bodies: Local Kirchhoff Law

et al. 2018

View full text Add to dashboard Cite

The goal of this paper is to introduce a local form of Kirchhoff law to model light emission by nonequilibrium bodies. While absorption by a finite-size body is usually described using the absorption cross section, we introduce a local absorption rate per unit volume and also a local thermal emission rate per unit volume. Their equality is a local form of Kirchhoff law. We revisit the derivation of this equality and extend it to situations with subsystems in local thermodynamic equilibrium but not in equilibrium between them, such as hot electrons in a metal or electrons with different Fermi levels in the conduction band and in the valence band of a semiconductor. This form of Kirchhoff law can be used to model (i) thermal emission by nonisothermal finite-size bodies, (ii) thermal emission by bodies with carriers at different temperatures, and (iii) spontaneous emission by semiconductors under optical (photoluminescence) or electrical pumping (electroluminescence). Finally, we show that the reciprocity relation connecting light-emitting diodes and photovoltaic cells derived by Rau is a particular case of the local Kirchhoff law.

show abstract

“…In the late nineteenth century, Kirchhoff [3] and other experimental physicists found that an ideal blackbody, in thermodynamic equilibrium, emitted radiant energy whose spectrum was continuous and a function only of its wavelength and temperature, independent of the nature of the blackbody. However, this behavior could not be explained using thermodynamics or classical statistical mechanics.…”

Section: Descriptionmentioning

confidence: 99%

Blackbody and Blackbody Radiation

Zwinkels¹

2015

Encyclopedia of Color Science and Technology

View full text Add to dashboard Cite

READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.http://nparc.nrc-cnrc.gc.ca/eng/copyright Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.https://doi.org/10.1007/978-3-642-27851-8_370-1 Access and use of this website and the material on it are subject to the Terms and Conditions set forth at Blackbody and blackbody radiation Zwinkels, Joanne C.http://nparc.nrc-cnrc.gc.ca/fra/droits L'accès à ce site Web et l'utilisation de son contenu sont assujettis aux conditions présentées dans le site

show abstract

I. On the relation between the radiating and absorbing powers of different bodies for light and heat

Cited by 155 publications

References 0 publications

Narrowband terahertz emitters using metamaterial films

Narrowband terahertz emitters using metamaterial films

Light Emission by Nonequilibrium Bodies: Local Kirchhoff Law

Blackbody and Blackbody Radiation

Contact Info

Product

Resources

About