There is an absorption band around 700cm-1 in the infrared absorption spectrum, which being identical with that of the bulk crystals, a wider infrared transition region is given by the films.

• 结果表明,薄膜的红外吸收谱在700cm~(-1)处有一吸收带,与块状晶体相同,因此有较宽的红外透过区。