光学学报, 2011, 31 (s1): s100114, 网络出版: 2011-06-27  

激光斜入射对薄膜光学特性影响的数值分析

Numerical Analysis of Optical Properties under Oblique Incidence of Laser in Optical Thin Films
作者单位
国防科学技术大学光电科学与工程学院, 湖南 长沙 410073
摘要
针对斜入射激光辐照光学薄膜的情况,将激光的电矢量正交分解为s偏振和p偏振,并从麦克斯韦方程组出发,求得激光在膜层中传输的电磁场分布,进而对薄膜的光学特性进行了数值分析。以高反膜为例,结果表明:随着入射角的增大,s偏振光的反射率、透射率和吸收率有微小的浮动;而p偏振光的反射率、透射率和吸收率有明显的变化,其反射率逐渐减小,透射率和吸收率逐渐增大;在高反膜中心波长附近,s偏振光和p偏振光均有一高反宽带,与s偏振光相比,p偏振光的宽带明显变窄,且p偏振光的吸收率相对较高。
Abstract
Considering optical thin films irradiated by laser at oblique incidence, the electric vector is orthogonally decomposed into s-polarization and p-polarization. And based on the Maxwell equations, electromagnetic-field distribution in optical thin films is obtained. Then the optical properties of optical thin films are numerically analyzed. The results about high-reflection thin film show some features as follows. With the increase of the angle of incidence, the reflectance, transmittance and absorptivity of s-polarized light have tiny fluctuations. But for p-polarized light, obviously, the reflectance shows gradually decrease while the transmittance and absorptivity are opposite. And near the central wavelength in high-reflection thin film, both s-polarized light and p-polarized light have a high-reflectance broadband. Compared with s-polarized light, the broadband for p-polarized light is manifestly narrower and the absorptivity is relatively higher.

贺敏波, 江厚满, 陈敏孙, 袁春. 激光斜入射对薄膜光学特性影响的数值分析[J]. 光学学报, 2011, 31(s1): s100114. He Minbo, Jiang Houman, Chen Minsun, Yuan Chun. Numerical Analysis of Optical Properties under Oblique Incidence of Laser in Optical Thin Films[J]. Acta Optica Sinica, 2011, 31(s1): s100114.

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