摘要
本文主要采用时域有限差分(FDTD)方法计算了二维椭圆柱形光学黑洞的红外辐射特性。并且采用几何光学近似(GOA)对椭圆柱形的光学黑洞的光线入射轨迹进行分析和比较。研究结果表明,FDTD计算的光学黑洞内的能流分布结果与GOA计算的光学黑洞内的光线入射轨迹结果相吻合,椭圆柱形光学黑洞的红外辐射特性主要受折射率梯度和入射波长的影响。
nfrared radiative properties of elliptic cylindrical optical black holes （ECOBHs） are numerical analyzed using the finite-difference time-domain （FDTD） method in this paper. And the Poynting vectors obtained by the FDTD method were compared with the ray trajectories calculated by the geometric optics approximation （GOA）. The results show that the Poynting vectors obtained by the FDTD method agree well with the ray trajectories calculated by the GOA. The infrared radiative properties of ECOBHs are mainly affected by gradient index and incident wavelength.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2012年第8期1367-1370,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.50836002
No.51121004)
关键词
时域有限差分法
几何光学近似
椭圆柱形光学黑洞
折射率梯度
finite-difference time-domain method
geometric optics approximation
elliptic cylindri-cal optical black hole
gradient index
