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arXiv 2203.07014physics.opticsquant-ph
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等离子体纳米天线的激发和辐射衰减速率

On the Excitation and Radiative Decay Rates of Plasmonic Nanoantennas

Kalun Bedingfield, Angela Demetriadou

摘要:

等离子体纳米天线能够将入射电磁场限制和增强到非常亚波长的体积中,同时有效地将能量辐射到远场。这些特性使得等离子体纳米天线被广泛用于激发量子发射体,如分子和量子点,也用于从它们中提取光子,用于远场测量。由于电磁互易性,预期等离子体纳米天线辐射能量与外部源可以将能量耦合到它们一样有效。在本文中,我们采用多极展开(米氏理论)和数值模拟表明,虽然互易性举行,某些等离子体天线辐射能量更有效地比一个可以耦合到他们的能量。这项工作铺平了道路,设计等离子体天线的特定属性的应用程序中的近远场的关系是非常重要的,如:表面增强拉曼光谱,在室温下的强耦合,和工程的量子态的纳米等离子体器件。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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