【摘要】 对由富碲( <1mol.% )碲化铅晶体材料热蒸发制备的薄膜进行了表征.结果表明:薄膜是多晶的,具有NaCl型晶体结构,表面晶粒分布均匀,在膜层的深度方向约 170nm内富碲的组分均匀分布.对比薄膜表面抛光前后的中红外光学常数表明表面散射对薄膜光学性质的影响极小.更多还原

【Abstract】 The characterizations of Te-rich PbTe layer thermal-evaporated from an excess of Te (<1 mol.%) evaporable materials were reported. The results reveal that the films obtained are polycrystalline and have single-phase NaCl-type PbTe crystal structure. It is also demonstrated that the films have homogeneous surface morphology and homogeneous distribution of Te-rich components along the layer in the range of 170 nm. The study on mid-infrared optical constants of film surface-polished indicates that the influence of surface scattering on optical properties is very small.更多还原