Konopsky Valery N, Alieva Elena V
Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow Region, 142190, Russia.
Phys Rev Lett. 2006 Dec 22;97(25):253904. doi: 10.1103/PhysRevLett.97.253904.
We present experimental results on ultralong-range surface plasmon polaritons, propagating in a thin metal film on a one-dimensional (1D) photonic crystal surface over a distance of several millimeters. This propagation length is about 2 orders of magnitude higher than the one in the ordinary Kretschmann configuration at the same optical frequency. We show that a long-range surface plasmon polaritons propagation may take place not only in a (quasi)symmetrical scheme, where a thin metal film is located between two media with (approximately) the same refraction index, but also in a scheme where the thin metal film is located between an appropriate 1D photonic crystal and an arbitrary (air, water, etc.) medium. The ultralong-range surface plasmon polaritons are potentially important for biosensors, plasmonics, and other applications.
我们展示了关于超长程表面等离激元极化激元的实验结果，其在一维（1D）光子晶体表面上的薄金属膜中传播了数毫米的距离。该传播长度比在相同光频率下普通Kretschmann配置中的传播长度高出约2个数量级。我们表明，长程表面等离激元极化激元的传播不仅可以在（准）对称方案中发生，即薄金属膜位于两个（近似）具有相同折射率的介质之间，而且也可以在薄金属膜位于合适的一维光子晶体和任意（空气、水等）介质之间的方案中发生。超长程表面等离激元极化激元对生物传感器、等离子体学及其他应用可能具有重要意义。
