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Conference Paper: Dyadic Green's Function, Spectral Function, Local Density of States, and Fluctuation Dissipation Theorem

TitleDyadic Green's Function, Spectral Function, Local Density of States, and Fluctuation Dissipation Theorem
Authors
Issue Date2014
PublisherElectromagnetics Academy. The Journal's web site is located at http://www.piers.org/piersproceedings/
Citation
The 35th Progress in Electromagnetics Research Symposium (PIERS), Guangzhou, China, 25-28 August 2014. In the Abstracts of the 35th Progress in Electromagnetics Research Symposium (PIERS), 2014, p. 714 How to Cite?
AbstractIn this talk, we will discuss the relation between dyadic, spectral function, local density of states, and fluctuation dissipation theorem in electromagnetics. Using a retarded and advanced Green’s function, one can define a spectral function that is non-causal, but Hermitian. From this spectral function, one can derive the local density of states and density of states quite easily. Since the system is Hermitian, the energy density can be related to quantized electromagnetic field, and hence, the Planck distribution function can be used to derive it. For lossy dispersive media, this connection is less obvious, but a connection to Planck distribution law can still be made. Moreover, this path of deriving the energy density can be related to the fluctuation dissipation theorem for lossy, dispersive media. We will derive useful formulas and show the connection by solving Maxwell’s equations in vacuum, lossless, lossy, and inhomogeneous dispersive media.
DescriptionKeynote Speech
Persistent Identifierhttp://hdl.handle.net/10722/204096
ISSN

 

DC FieldValueLanguage
dc.contributor.authorChew, WCen_US
dc.contributor.authorSha, Wen_US
dc.date.accessioned2014-09-19T20:05:06Z-
dc.date.available2014-09-19T20:05:06Z-
dc.date.issued2014en_US
dc.identifier.citationThe 35th Progress in Electromagnetics Research Symposium (PIERS), Guangzhou, China, 25-28 August 2014. In the Abstracts of the 35th Progress in Electromagnetics Research Symposium (PIERS), 2014, p. 714en_US
dc.identifier.issn1559-9450-
dc.identifier.urihttp://hdl.handle.net/10722/204096-
dc.descriptionKeynote Speech-
dc.description.abstractIn this talk, we will discuss the relation between dyadic, spectral function, local density of states, and fluctuation dissipation theorem in electromagnetics. Using a retarded and advanced Green’s function, one can define a spectral function that is non-causal, but Hermitian. From this spectral function, one can derive the local density of states and density of states quite easily. Since the system is Hermitian, the energy density can be related to quantized electromagnetic field, and hence, the Planck distribution function can be used to derive it. For lossy dispersive media, this connection is less obvious, but a connection to Planck distribution law can still be made. Moreover, this path of deriving the energy density can be related to the fluctuation dissipation theorem for lossy, dispersive media. We will derive useful formulas and show the connection by solving Maxwell’s equations in vacuum, lossless, lossy, and inhomogeneous dispersive media.-
dc.languageengen_US
dc.publisherElectromagnetics Academy. The Journal's web site is located at http://www.piers.org/piersproceedings/-
dc.relation.ispartofProgress in Electromagnetics Research Symposiumen_US
dc.titleDyadic Green's Function, Spectral Function, Local Density of States, and Fluctuation Dissipation Theoremen_US
dc.typeConference_Paperen_US
dc.identifier.emailChew, WC: wcchew@hku.hken_US
dc.identifier.emailSha, W: shawei@hku.hken_US
dc.identifier.authorityChew, WC=rp00656en_US
dc.identifier.authoritySha, W=rp01605en_US
dc.identifier.hkuros238973en_US
dc.identifier.spage714-
dc.identifier.epage714-
dc.publisher.placeUnited Statesen_US

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