金属纳米线阵列全光调制
发布时间：2018-11-14 10:02
【摘要】：提出一种基于长程表面等离子体的介质-金属纳米线阵列-非线性介质复合全光调制器.考虑克尔效应对折射率变化的影响,采用时域有限差分法分析了金属纳米线直径、介质层厚度和泵浦光强度对反射谱的影响,通过合理配置金属纳米线和介质层的参数提高调制器的耦合性能,并在此基础上分析不同强度泵浦光的反射特性.结果表明:当金属纳米线直径为40nm,介质层厚度为1 800nm时,全光调制器的模式耦合能力达到最强.反射谱的反射率与泵浦光强度的变化呈线性关系,相关系数为0.998 1,且只需要0.5GW/cm~2功率的泵浦光就能使入射光的反射率从0.015提高到0.82,较好地实现光信号对光的全光调制.
[Abstract]:A dielectric-metal nanowire array-nonlinear dielectric composite all-optical modulator based on long-range surface plasma is proposed. Considering the effect of Kerr effect on refractive index change, the influence of metal nanowire diameter, dielectric layer thickness and pump intensity on the reflectance spectrum is analyzed by using the finite-difference time-domain method. The coupling performance of the modulator is improved by rationally configuring the parameters of metal nanowires and dielectric layers and the reflection characteristics of pump light with different intensities are analyzed. The results show that when the diameter of metal nanowires is 40 nm and the thickness of dielectric layer is 1 800nm, the mode coupling ability of the all-optical modulator is the strongest. The reflectivity of the reflection spectrum is linearly related to the variation of the intensity of the pump light, the correlation coefficient is 0.998, and the reflectivity of the incident light can be increased from 0.015 to 0.82 only by the pump light of 0.5GW/cm~2 power. The all-optical modulation of optical signal is realized well.
【作者单位】： 燕山大学里仁学院;燕山大学电气工程学院;
【基金】：国家自然科学基金(No.61172044)资助~~
【分类号】：TN761;TN929.1
[Abstract]:A dielectric-metal nanowire array-nonlinear dielectric composite all-optical modulator based on long-range surface plasma is proposed. Considering the effect of Kerr effect on refractive index change, the influence of metal nanowire diameter, dielectric layer thickness and pump intensity on the reflectance spectrum is analyzed by using the finite-difference time-domain method. The coupling performance of the modulator is improved by rationally configuring the parameters of metal nanowires and dielectric layers and the reflection characteristics of pump light with different intensities are analyzed. The results show that when the diameter of metal nanowires is 40 nm and the thickness of dielectric layer is 1 800nm, the mode coupling ability of the all-optical modulator is the strongest. The reflectivity of the reflection spectrum is linearly related to the variation of the intensity of the pump light, the correlation coefficient is 0.998, and the reflectivity of the incident light can be increased from 0.015 to 0.82 only by the pump light of 0.5GW/cm~2 power. The all-optical modulation of optical signal is realized well.
【作者单位】： 燕山大学里仁学院;燕山大学电气工程学院;
【基金】：国家自然科学基金(No.61172044)资助~~
【分类号】：TN761;TN929.1
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