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Fine-Structure Level Transition for Incoherent-Gain Isotropic Negative Permeability
KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
2013 (English)In: Journal of the Physical Society of Japan, ISSN 0031-9015, E-ISSN 1347-4073, Vol. 82, no 12, 124003- p.Article in journal (Refereed) Published
Abstract [en]

A three-dimensionally isotropic negative permeability of a neutral alkali-metal atomic medium, in which a fine-structure magnetic dipole-allowed transition in terahertz band is pumped for population transfer (and hence incoherent gain for negative permeability can be realized), is suggested based on quantum optical approach. The effects relevant to photonic resonance and quantum coherence are involved in the present quantum optical scheme of pumped magnetic-dipole allowed transition. The incoherent-gain assisted atomic medium (with fine-structure transition involved) may have some attractive features, e. g., three-dimensionally isotropic and homogeneous negative permeability for high-gain wave amplification at terahertz frequencies. Such a gain-assisted negative-permeability medium can be a candidate of magnetically resonant materials for artificial composite metamaterials, e.g., it may serve as a substrate of lossy negative-index materials for loss compensation or as a supporting medium for high-gain amplification of a TE-mode surface plasmon-like wave.

Place, publisher, year, edition, pages
2013. Vol. 82, no 12, 124003- p.
Keyword [en]
fine-structure level transition, isotropic negative permeability, incoherent gain
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Identifiers
URN: urn:nbn:se:kth:diva-138356DOI: 10.7566/JPSJ.82.124003ISI: 000327350700015Scopus ID: 2-s2.0-84890898328OAI: oai:DiVA.org:kth-138356DiVA: diva2:681340
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QC 20131219

Available from: 2013-12-19 Created: 2013-12-19 Last updated: 2017-12-06Bibliographically approved

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