Dynamic tuning of photon-plasmon interaction based on three-dimensionally confined microtube cavities.
Dynamic tuning of photon-plasmon interaction based on three-dimensionally confined microtube cavities.
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DOI：
10.1364/ol.406292
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发表时间：
2020-10
期刊：
影响因子：
3.6
通讯作者：
Ehsan Saei Ghareh Naz;Yin Yin-Yin;Jiawei Wang;A. Madani;Libo Ma;O. Schmidt
中科院分区：
文献类型：
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作者：
Ehsan Saei Ghareh Naz;Yin Yin-Yin;Jiawei Wang;A. Madani;Libo Ma;O. Schmidt
我们提出了可调耦合的表面等离子体共振支持的金属纳米粒子涂层的尖端和三维（3D）限制的光学模式支持的微管腔。两种耦合机制之间的竞争和转换，即，电介质-电介质和等离子体激元-电介质耦合。由于两种耦合机制之间的竞争，可以动态地调谐谐振模式，以首先从较高能量转移到较低能量，然后恢复到较高能量。此外，三维受限模式的独特空间场分布允许奇数和偶数阶轴向模式与表面等离子体共振的选择性耦合。
We present tunable coupling between surface plasmon resonances supported by a metal-nanoparticle-coated tip and three-dimensionally (3D) confined optical modes supported by a microtube cavity. The competition and transition between two types of coupling mechanisms, i.e., dielectric-dielectric and plasmon-dielectric coupling, are observed in the tunable system. Owing to the competition between the two coupling mechanisms, the resonant modes can be dynamically tuned to first shift from higher to lower energies and then revert to higher energy. Moreover, the unique spatial field distribution of 3D confined modes allows selective coupling of odd and even order axial modes with surface plasmon resonances.