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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Radiative characteristics of nanopatch antennas based on plasmonic nanoparticles of various geometry and tris(2,2 '-bipyridine) ruthenium(II) hexafluorophosphate
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Radiative characteristics of nanopatch antennas based on plasmonic nanoparticles of various geometry and tris(2,2 '-bipyridine) ruthenium(II) hexafluorophosphate

机译：基于各种几何和三颗粒纳米粒子的纳米分离天线的辐射特性（2,2'-吡啶）钌（II）六氟磷酸盐

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摘要

Effective interaction of light with quantum emitters is important for the development of efficient high-frequency nanophotonic devices. One of the most attractive ways of solving this problem is the employment of nanopatch antennas (NPAs) with various efficient photon emitters. In the present study, we investigated the properties of the NPAs with different geometries involving a [Ru(bpy)(3)](2+) complex (tris(2,2'-bipyridine) ruthenium(II) hexafluorophosphate) which was taken as a highly stable emitter. An increase in the radiation power of the metalorganic system was experimentally obtained. In particular, an increase in the photoluminescence intensity of the emitter was observed, and a significant reduction (down to 7 ns) in the lifetime of the excited states in the Ru-complex (with 'free' lifetime of about 850 ns) was demonstrated for an inhomogeneous 'aluminum-silver nanoparticle' system incorporating the Ru-complex. The increase in the spontaneous emission rate of [Ru(bpy)(3)](2+) was attributed to the Purcell effect. The averaged values of the Purcell factors obtained for the emitter in the resonator with pentagonal and hexagonal silver nanoparticles were 100 and 120, respectively. It was shown that in an NPA with single vertically oriented emitters, the maximum values of the Purcell factors can be as high as 10(3). Also, radiation patterns were simulated showing that the radiation maximum is observed at an angle of about 50 degrees to the surface of the nanoantenna. Luminescence enhancement factors for the studied types of NPAs were obtained both experimentally and theoretically.
机译：光光与量子发射器的有效相互作用对于高效的高频纳米芯型器件的开发是重要的。解决这个问题的最具吸引力的方法之一是使用各种有效的光子发射器的纳米分离天线（NPA）的工作。在本研究中，我们研究了NPA的性质，其不同几何形状涉及[Ru（BPY）（3）]（2+）复合物（Tris（2,2'-Bibyridine）钌（II）六氟磷酸）作为一个高度稳定的发射器。实验获得了金属有机系统的辐射功率的增加。特别地，观察到发射器的光致发光强度的增加，并在Ru-复合物中的兴奋状态的寿命中显着减少（下降至7ns）（具有约850ns的自由寿命）对于包含Ru-络合物的不均匀的“铝 - 银纳米粒子”体系。 [Ru（BPY）（3）]（2+）的自发发射率的增加归因于嘌呤效应。用五边形和六边形银纳米粒子的谐振器中的发射器获得的PURCELL因子的平均值分别为100和120。结果表明，在具有单个垂直定向发射器的NPA中，PURCell因子的最大值可以高达10（3）。而且，模拟了辐射图，表明辐射最大值以约50度的角度观察到纳米天线的表面。实验和理论上，在实验和理论上获得研究类型的NPA的发光增强因子。

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