论文标题
关于等离子纳米antennas的激发和辐射衰减速率
On the Excitation and Radiative Decay Rates of Plasmonic Nanoantennas
论文作者
论文摘要
等离子体纳米antennas具有将入射电磁场局限于非常小波的体积的能力，同时有效地将能量辐射到远场。这些特性使等离子纳米antennas可以广泛用于令人兴奋的量子发射器，例如分子和量子点，也可以从中提取光子从中提取光子，以在远场进行测量。由于电磁互惠，预计等离子纳米anna辐射能量与外部源一样有效地辐射能量可以使能量融入其中。在本文中，我们采用多极扩展（MIE理论）和数值模拟，以表明，尽管相互互动成立，但某些等离子天线辐射能量的效率要比一个能量将能量融入其中的能量要高得多。这项工作为设计具有特定特性的等离子天线铺平了道路，这些应用具有特定的应用，在这些应用中，接近田间关系具有很高的意义，例如：表面增强的拉曼光谱，在室温下进行强耦合以及纳米质设备中量子状态的工程。
Plasmonic nanoantennas have the ability to confine and enhance incident electromagnetic fields into very sub-wavelength volumes, while at the same time efficiently radiating energy to the far-field. These properties have allowed plasmonic nanoantennas to be extensively used for exciting quantum emitters-such as molecules and quantum dots-and also for the extraction of photons from them for measurements in the far-field. Due to electromagnetic reciprocity, it is expected that plasmonic nanoantennas radiate energy as efficiently as an external source can couple energy to them. In this paper, we adopt a multipole expansion (Mie theory) and numerical simulations to show that although reciprocity holds, certain plasmonic antennas radiate energy much more efficiently than one can couple energy into them. This work paves the way towards designing plasmonic antennas with specific properties for applications where the near-to-far-field relationship is of high significance, such as: surface-enhanced Raman spectroscopy, strong coupling at room temperature, and the engineering of quantum states in nanoplasmonic devices.
