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Condensed Matter > Mesoscale and Nanoscale Physics

arXiv:1606.00050 (cond-mat)
[Submitted on 31 May 2016 (v1), last revised 2 Jun 2016 (this version, v2)]

Title:Purcell effect at metal-insulator transitions

Authors:D. Szilard, W. J. M Kort-Kamp, F. S. S. Rosa, F. A. Pinheiro, C. Farina
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Abstract:We investigate the spontaneous emission rate of a two-level quantum emitter next to a composite medium made of randomly distributed metallic inclusions embedded in a dielectric host matrix. In the near-field, the Purcell factor can be enhanced by two-orders of magnitude relative to the case of an homogeneous metallic medium, and reaches its maximum precisely at the insulator-metal transition. By unveiling the role of the decay pathways on the emitter's lifetime, we demonstrate that, close to the percolation threshold, the radiation emission process is dictated by electromagnetic absorption in the heterogeneous medium. We show that our findings are robust against change in material properties, shape of inclusions, and apply for different effective medium theories as well as for a wide range of transition frequencies.
Comments: 8 pages, 7 figures
Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Quantum Physics (quant-ph)
Cite as: arXiv:1606.00050 [cond-mat.mes-hall]
  (or arXiv:1606.00050v2 [cond-mat.mes-hall] for this version)
  https://doi.org/10.48550/arXiv.1606.00050
Journal reference: Phys. Rev. B 94, 134204 (2016)
Related DOI: https://doi.org/10.1103/PhysRevB.94.134204

Submission history

From: Daniela Szilard [view email]
[v1] Tue, 31 May 2016 21:24:44 UTC (4,490 KB)
[v2] Thu, 2 Jun 2016 13:54:15 UTC (4,490 KB)
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