Modified method of surface plasmons in metal superlattices*
Zhang Yu-Lianga), Wang Xuan-Zhangb)†
Dispersion curves of SP of the metal-layer array. Besides Eq. ( 5 ), panels (a)–(d) are related to Eqs. ( 7a )–( 7d ), respectively. The horizontal purple lines in panels (a) and (b) are the given mode. The dot lines in panels (c) and (d) mean d m = 1. The dot lines show the SP mode of the bulk metals with frequency of 0.418 ω p.