Purcell effect at the percolation transition
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 a hom...
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| Veröffentlicht in: | Physical review. B 2016-10, Vol.94 (13), p.134204, Article 134204 |
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| container_title | Physical review. B |
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| creator | Szilard, D. Kort-Kamp, W. J. M. Rosa, F. S. S. Pinheiro, F. A. Farina, C. |
| description | 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 a homogeneous metallic medium and reaches its maximum precisely at the insulator-metal transition. By unveiling the role of the decay pathways in 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 and shape of inclusions and apply for different effective-medium theories as well as for a wide range of transition frequencies. |
| doi_str_mv | 10.1103/PhysRevB.94.134204 |
| format | Article |
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| source | American Physical Society Journals |
| subjects | CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY Electromagnetic absorption Emission analysis Emitters Energy Sciences Inclusions Material properties Material Science Percolation Spontaneous emission |
| title | Purcell effect at the percolation transition |
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