Microscopic model of Purcell enhancement in hyperbolic metamaterials
Microscopic model of Purcell enhancement in hyperbolic metamaterials
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DOI：
10.1103/physrevb.86.035148
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发表时间：
2012-07-30
影响因子：
3.7
通讯作者：
Kivshar, Yuri S.
中科院分区：
文献类型：
--
作者：
Poddubny, Alexander N.;Belov, Pavel A.;Kivshar, Yuri S.
我们从理论上研究了双曲色散模型的各向异性共振偶极子的立方晶格的超材料的自发辐射的显着增强。我们分析了珀塞尔因子对晶格单元中的源位置的依赖性，并证明了实现大的珀塞尔因子和兰姆位移所需的最佳发射器位置在局部场最大值中。我们表明，计算出的绿色函数具有特征的十字形状，空间调制由于结构的离散性。我们的基本微观理论为快速发展的双曲型超材料领域提供了基本的见解。
We study theoretically the dramatic enhancement of spontaneous emission in metamaterials with the hyperbolic dispersion modeled as a cubic lattice of anisotropic resonant dipoles. We analyze the dependence of the Purcell factor on the source position in the lattice unit cell and demonstrate that the optimal emitter positions needed to achieve large Purcell factors and Lamb shifts are in the local field maxima. We show that the calculated Green function has a characteristic crosslike shape, spatially modulated due to the structural discreteness. Our basic microscopic theory provides fundamental insights into the rapidly developing field of hyperbolic metamaterials.