CAJ | 학술논문

应用分光光度计测量Te/TeO2-SiO2复合薄膜的透射光谱和吸收光谱,在480nm附近观察到Te颗粒引起的等离子体共振吸收峰;采用Z扫描技术研究了共振(激发波长为532 nm)和非共振情况下(激发波长1064 nm)不同电位制备薄膜的Te颗粒状态与复合薄膜的三阶非线性极化率的关系.基于有效介质理论对复合薄膜的三阶非线性效应进行分析,研究Te颗粒大小对Te/TeO2-SiO2复合薄膜的非线性光学性质的影响及其产生机理.结果表明薄膜制备过电位增大, Te的粒径减小,颗粒数量多,颗粒分布趋于均匀,使得金属颗粒的表面等离子体共振峰红移,吸收强度增强,导致三阶非线性光学效应增强,χ(3)由1064 nm的5.12×10?7 esu增大为532 nm的8.11×10?7 esu.
응용분광광도계측량Te/TeO2-SiO2복합박막적투사광보화흡수광보,재480nm부근관찰도Te과립인기적등리자체공진흡수봉;채용Z소묘기술연구료공진(격발파장위532 nm)화비공진정황하(격발파장1064 nm)불동전위제비박막적Te과립상태여복합박막적삼계비선성겁화솔적관계.기우유효개질이론대복합박막적삼계비선성효응진행분석,연구Te과립대소대Te/TeO2-SiO2복합박막적비선성광학성질적영향급기산생궤리.결과표명박막제비과전위증대, Te적립경감소,과립수량다,과립분포추우균균,사득금속과립적표면등리자체공진봉홍이,흡수강도증강,도치삼계비선성광학효응증강,χ(3)유1064 nm적5.12×10?7 esu증대위532 nm적8.11×10?7 esu.
The transmission and absorption spectra of the Te/TeO2-SiO2 thin film were obtained by using a spectrophotometer, with the surface plasmon rensoance (SPR) observed at 480 nm. While the dependence of the third-order nonlinear susceptibility of composite films on the Te particle was investigated by Z-scan technique with renosant wavelength (532 nm) and non-renosant wavelength (1064 nm). Optical properties of these films was analyzed using the effective medium theory, and the relationship was investigated to obtain Te particle size and nonlinear optical properties of Te/TeO2-SiO2 films. The results show that the Te particle size was smaller, the number of particles was increased, and the particle distribution tends to be uniform. The surface plasmon resonance peak was red-shifted, and the absorption intensity was enhanced;and the third-order nonlinear optical effects was enhanced,χ(3) was increased by 5.12×10?7 esu at 1064 nm to 8.11×10?7 esu at 532 nm with preparation potential increased.