系统地研究 Z切 L i Nb O3晶体中质子交换波导和退火质子交换波导的特性 ,得到了质子交换过程中的扩散常数和激活能 ,发现了质子交换波导的折射率呈线性阶跃型的折射率分布。通过连续退火 ,波导的折射率分布由线性阶跃型向高斯型过渡。...系统地研究 Z切 L i Nb O3晶体中质子交换波导和退火质子交换波导的特性 ,得到了质子交换过程中的扩散常数和激活能 ,发现了质子交换波导的折射率呈线性阶跃型的折射率分布。通过连续退火 ,波导的折射率分布由线性阶跃型向高斯型过渡。退火可分为两个阶段 ,波导深度的增加在第一阶段随退火时间成指数关系 ,第二阶段与退火时间的平方根成线性关系。展开更多
We perform a semi-analytical calculation of the field distributions of a conformal invisible device via mode expansions. For a discrete set of frequencies in the regime of wave optics, the conformal invisible device i...We perform a semi-analytical calculation of the field distributions of a conformal invisible device via mode expansions. For a discrete set of frequencies in the regime of wave optics, the conformal invisible device is perfectly transparent, which stems from the special conformal mapping and the refractive- index profile of the Mikaelian lens.展开更多
文摘系统地研究 Z切 L i Nb O3晶体中质子交换波导和退火质子交换波导的特性 ,得到了质子交换过程中的扩散常数和激活能 ,发现了质子交换波导的折射率呈线性阶跃型的折射率分布。通过连续退火 ,波导的折射率分布由线性阶跃型向高斯型过渡。退火可分为两个阶段 ,波导深度的增加在第一阶段随退火时间成指数关系 ,第二阶段与退火时间的平方根成线性关系。
基金This work was supported by the National Natural Science Foundation of China for Excellent Young Scientists （Grant No. 61322504）, the Foundation for the Author of National Excellent Doctoral Dissertation of China （Grant No. 201217）, andFundamental Research Funds for the Central Universities （Grant No. 20720170015）.
文摘We perform a semi-analytical calculation of the field distributions of a conformal invisible device via mode expansions. For a discrete set of frequencies in the regime of wave optics, the conformal invisible device is perfectly transparent, which stems from the special conformal mapping and the refractive- index profile of the Mikaelian lens.
