Abnormal Cutoff Thickness of Long-Range Surface Plasmon Polariton Modes Guided by Thin Metal Films  

作　　者：刘仿 饶轶 黄翊东 张巍 彭江得 

机构地区：[1]State Key Lab of Integrated Optoelectronics, Department of Electronic Engineering, Tsinghua University, Beijing 100084

出　　处：《Chinese Physics Letters》2007年第12期3462-3465,共4页中国物理快报（英文版）

摘　　要：Long-range surface plasmon polariton （LRSPP） modes guided by a thin metal film surrounded by semi-infinite dielectrics with different refractive indices are studied. Our calculation results show that the cutoff thickness of the metal film does not monotonically increase with refractive index difference An between the substrate and superstrate. Just because of this abnormal behaviour of cutoff thickness, the existence of LRSPP illustrates complicated situations in asymmetric configurations. For a certain metal film thickness, LRSPP may exist in one, two or three refractive index difference Δn regions.Long-range surface plasmon polariton （LRSPP） modes guided by a thin metal film surrounded by semi-infinite dielectrics with different refractive indices are studied. Our calculation results show that the cutoff thickness of the metal film does not monotonically increase with refractive index difference An between the substrate and superstrate. Just because of this abnormal behaviour of cutoff thickness, the existence of LRSPP illustrates complicated situations in asymmetric configurations. For a certain metal film thickness, LRSPP may exist in one, two or three refractive index difference Δn regions.

关 键 词：THERMOELECTRIC half-Heusler compounds thermal conductivity 

分 类 号：O484[理学—固体物理]