Theory of lasing action in plasmonic crystals
Theory of lasing action in plasmonic crystals
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DOI：
10.1103/physrevb.91.041118
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发表时间：
2015-01-26
影响因子：
3.7
通讯作者：
Bravo-Abad, J.
中科院分区：
文献类型：
--
作者：
Cuerda, J.;Rueting, F.;Bravo-Abad, J.
我们从理论上研究了光泵四能级增益介质等离子体晶体中的激光作用。通过使用详细的模拟的基础上的时域推广的有限元方法，我们表明，激发暗等离子体共振（通过增益介质），使访问所考虑的类系统的最佳激射特性。此外，我们的研究表明，在一般情况下，阵列的纳米线特征较低的激光阈值和较大的斜率效率比那些对应的周期性阵列的亚波长孔径。这些发现对于基于等离子体激元晶体的有源器件的进一步工程化具有相关性。
We theoretically investigate lasing action in plasmonic crystals incorporating optically pumped four-level gain media. By using detailed simulations based on a time-domain generalization of the finite-element method, we show that the excitation of dark plasmonic resonances (via the gain medium) enables accessing the optimal lasing characteristics of the considered class of systems. Moreover, our study reveals that, in general, arrays of nanowires feature lower lasing thresholds and larger slope efficiencies than those corresponding to periodic arrays of subwavelength apertures. These findings are of relevance for further engineering of active devices based on plasmonic crystals.