Magnetic Light-Matter Interactions in a Photonic Crystal Nanocavity
Magnetic Light-Matter Interactions in a Photonic Crystal Nanocavity
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DOI：
10.1103/physrevlett.105.123901
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发表时间：
2010-09-17
影响因子：
8.6
通讯作者：
Kuipers, L.
中科院分区：
文献类型：
--
作者：
Burresi, M.;Kampfrath, T.;Kuipers, L.
我们研究金属涂层近场探针和光子晶体纳米腔之间的磁耦合。当探针的环形顶点位于腔磁场的波腹上方时，纳米腔的共振转移到较短的波长。我们证明这可以归因于磁光与物质的相互作用，并且实际上是楞次定律在光频率下的表现。我们使用这些测量来确定探针顶点的磁极化率，并发现与理论的吻合程度。我们讨论如何应用这种方法来研究纳米物体的电和磁极化率。
We study the magnetic coupling between a metal-coated near-field probe and a photonic crystal nanocavity. The resonance of the nanocavity shifts to shorter wavelengths when the ringlike apex of the probe is above an antinode of the magnetic field of the cavity. We show that this can be attributed to a magnetic light-matter interaction and is in fact a manifestation of Lenz's law at optical frequencies. We use these measurements to determine the magnetic polarizability of the apex of the probe and find good agreement with theory. We discuss how this method could be applied to study the electric and magnetic polarizibilities of nano-objects.