Local-field effects in radiatively broadened magneto-dielectric media: negative refraction and absorption reduction
| dc.creator | Kästel, Jürgen | |
| dc.creator | Fleischhauer, Michael | |
| dc.creator | Juzeliūnas, Gediminas | |
| dc.date | 2007-04-04 | |
| dc.date | 2007-09-27 | |
| dc.date.accessioned | 2026-07-07T08:32:10Z | |
| dc.date.available | 2026-07-07T08:32:10Z | |
| dc.description | We give a microscopic derivation of the Clausius-Mossotti relations for a homogeneous and isotropic magneto-dielectric medium consisting of radiatively broadened atomic oscillators. To this end the diagram series of electromagnetic propagators is calculated exactly for an infinite bi-cubic lattice of dielectric and magnetic dipoles for a lattice constant small compared to the resonance wavelength $λ$. Modifications of transition frequencies and linewidth of the elementary oscillators are taken into account in a selfconsistent way by a proper incorporation of the singular self-interaction terms. We show that in radiatively broadened media sufficiently close to the free-space resonance the real part of the index of refraction approaches the value -2 in the limit of $ρλ^3 \gg 1$, where $ρ$ is the number density of scatterers. Since at the same time the imaginary part vanishes as $1/ρ$ local field effects can have important consequences for realizing low-loss negative index materials. | |
| dc.description | 6 pages, 1 figure | |
| dc.identifier | https://arxiv.org/abs/0704.0593 | |
| dc.identifier | http://arxiv.org/abs/0704.0593 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/138718 | |
| dc.subject | Other Condensed Matter | |
| dc.subject | Optics | |
| dc.subject | Quantum Physics | |
| dc.title | Local-field effects in radiatively broadened magneto-dielectric media: negative refraction and absorption reduction | |
| dc.type | text |