A New Optical Phenomenon: Exciton Surface Polaritons at Room Temperature
A New Optical Phenomenon: Exciton Surface Polaritons at Room Temperature
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一种新的光学现象：室温下的激子表面极化子
DOI：
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发表时间：
1979
期刊：
影响因子：
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通讯作者：
J. Swalen
中科院分区：
文献类型：
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作者：
M. R. Philpott;A. Brillante;I. Pockrand;J. Swalen
用衰减全反射光谱法测定了三种有机固体在室温下的激振表面极化。这是第一次在任何材料的室温下观察到ESP。这三种固体是：CTIP为γ-环丙基（1,3,3-三甲基吲哚胺-2-基）五甲基氟硼酸盐。聚2,4-己二炔-1,6-二醇双（对甲苯磺酸）的PTS和四烷基萘醌二甲烷的TCNQ°。这三种材料在化学上非常不同，第一种是离子晶体，第二种是宏观长聚合物晶体，第三种是分子晶体。这三种材料支持ESP的共同特性是存在非常高强度的电子跃迁。这些跃迁具有非常宽的极化子阻带，其中介电张量的一个分量假定为负值。这是表面极化子存在的必要条件。
Abstract Excition surface polaritons (ESP's) have been detected by attenuated total reflection spectroscopy on three organic solids at room temperature. This is the first time that ESP's have been observed at room temperature on nay material. The three solids are: CTIP for γ-cyclopropylbis (1,3,3-trimethyl-indolenine-2-yl) pentamethinium fluoroborate. PTS for poly-2,4-hexadiyne-1,6-diol bis(p-toluene sulphonate) and TCNQ° for tetracynaoquinodimethane. These three materials are chemically very different, the first being an ionic crystal, and second a crystal of macroscopically long polymers, and the third a molecular crystal. The common property that allows all three to support ESP's is the existence of electronic transitions of very high intensity. These transitions have very wide polariton stop-bands within which one component of the dielectric tensor assumes negative values. This is a necessary condition for the existence of the surface polaritons.