Chau K J, Dice G D, Elezzabi A Y
Ultrafast Photonics and Nano-Optics Laboratory, Department of Electrical and Computer Engineering, University of Alberta, ECERF Building, Edmonton T6G 2V4, Canada.
Phys Rev Lett. 2005 May 6;94(17):173904. doi: 10.1103/PhysRevLett.94.173904. Epub 2005 May 5.
We experimentally show coherent, enhanced terahertz transmission through dense 3D random metallic media having subwavelength heterogeneity. Preservation of the incident polarization state and strong dispersion of the transmitted radiation indicate that the enhanced transmission is due to delocalized plasmonic propagation over distances 5 orders of magnitude greater than the skin depth. The experimental observations are supported by numerical finite difference time-domain simulations.
我们通过实验展示了太赫兹波在具有亚波长不均匀性的致密三维随机金属介质中的相干增强传输。入射偏振态的保留以及透射辐射的强色散表明，增强传输是由于离域等离子体激元在比趋肤深度大5个数量级的距离上传播所致。实验观测结果得到了时域有限差分数值模拟的支持。
