金属-光子晶体-金属结构中偏振光Tamm态的吸收特性

Absorption properties of polarized light Tamm state in metal-photonic crystal-metal structure

为了研究银-光子晶体-银结构中两种偏振光Tamm态的吸收性质,采用银介电常数的Drude-Lorentz色散模型和特征矩阵法,研究了吸收率随入射角、随周期数以及随银层厚度的变化规律。结果表明,在银-光子晶体-银结构中两种偏振光都会出现两个光学Tamm态(OTS),即OTS_1和OTS_2。两种偏振光的OTS_1和OTS_2的吸收峰值随着入射角的增大而逐渐增大,随着周期数的增大而缓慢增大,随着银层厚度的增大而明显增大。这些结论丰富了对银-光子晶体-银结构中两种偏振光Tamm态的吸收特性的认识。

In order to study absorption properties of Tamm state of two kinds of polarized light in silver-photonic crystalsilver structure,by using Drude-Lorentz dispersion model of silver dielectric constant and the characteristic matrix method,the variations of absorption rate with the change of incident angle,cycle number and silver layer thickness were studied.The results show that,two optical Tamm states would appear in two kinds of polarized lights in silver-photonic crystal-silver structure:OTS_1 and OTS_2.The absorption peak value would increase gradually with the increase of incidence angle,increase slowly with the increase of cycle number,and increase obviously with the increase of silver thickness.The study makes the deep understanding of absorption characteristics of Tamm state of two kinds of polarized light in silver-photonic crystal-silver structure.