Tamm plasmon-polaritons: Possible electromagnetic states at the interface of a metal and a dielectric Bragg mirror
Tamm plasmon-polaritons: Possible electromagnetic states at the interface of a metal and a dielectric Bragg mirror
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DOI：
10.1103/physrevb.76.165415
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发表时间：
2007-10-01
影响因子：
3.7
通讯作者：
Shelykh, I. A.
中科院分区：
文献类型：
--
作者：
Kaliteevski, M.;Iorsh, I.;Shelykh, I. A.
传统的表面等离子体具有超过真空中光的波矢，因此不能被简单地入射到表面的光直接激发。然而，我们提出，在金属和介质布拉格反射镜之间的边界处可以形成等离子体激元-偏振子态，该布拉格反射镜可以具有零面内波矢，因此可以通过直接光激发来产生。与Tamm提出的晶体表面电子态类似，我们将这些激发称为Tamm等离子体激元，并预测它们可能同时存在于TE和TM极化中，并且具有抛物线色散关系。
Conventional surface plasmons have a wave vector exceeding that of light in vacuum, and therefore cannot be directly excited by light that is simply incident on the surface. However, we propose that a plasmon-polariton state can be formed at the boundary between a metal and a dielectric Bragg mirror that can have a zero in-plane wave vector and therefore can be produced by direct optical excitation. In analogy with the electronic states at a crystal surface proposed by Tamm, we call these excitations Tamm plasmons, and predict that they may exist in both the TE and TM polarizations and are characterized by parabolic dispersion relations.