交联聚苯乙烯的太赫兹光谱特性

Terahertz spectroscopic properties of cross-linked polystyrene

交联聚苯乙烯是一种热固性塑料,具有优异的介电特性和耐高压击穿能力等特性。采用基于太赫兹波空气电离相干探测法(THz-ABCD)的太赫兹时域光谱系统,测量了交联聚苯乙烯和聚苯乙烯样品在太赫兹的光谱特性,得到了其在2~13THz频段的吸收系数、折射率等光学参数。研究结果表明:交联聚苯乙烯和聚苯乙烯的吸收谱形状相似,在6.6,9.8和12.25THz等处存在多个吸收峰,但是交联聚苯乙烯的吸收系数在12THz以下高于聚苯乙烯,在12THz以上低于聚苯乙烯;交联聚苯乙烯的折射率高于聚苯乙烯,聚苯乙烯的折射率在1.58~1.59之间,交联聚苯乙烯的折射率在1.59~1.62之间。

Cross-linked polystyrene is a kind of thermosetting plastic with excellent dielectric properties and high breakdown voltage. We measured the terahertz spectra of cross-linked polystyrene and polystyrene using THz-TDS based on THz-ABCD（air biased coherent detector）, and the absorption coefficients and refractive indexes in the range of 2-13 THz were obtained. The terahertz spectra of cross-linked polystyrene and polystyrene were similar, and there existed several absorption peaks such as 6.6 THz, 9.8 THz and 12.25 THz, the absorption coefficient of cross-linked polystyrene was higher than that of polystyrene below 12 THz but lower above 12 THz, the refractive index of cross-linked polystyrene （1.59-1.62） was higher than that of polystyrene （1.58-1.59）.