摘要
基于分离变量法研究了双层同心和偏心介质球微腔的光学特性,通过计算其散射效率和不对称因子分析了内核的位置、尺寸以及入射角度等因素对谐振廓线的影响。研究结果表明,当内外两层颗粒的折射率不同时,内核粒子的位置以及尺寸将对偏心球的形貌共振(MDR)产生影响。通过计算球形粒子的内场角度平均强度发现,当内核粒子的位置位于能量集中区域时,MDR的位置和廓线受入射角度影响较大。
Optical characteristics of the two-layer micro-sphere cavity are studied based on the method of separation of variables. The affection of the position and size of the inclusion and the incidence angle of the plane wave to the morphology-dependent resonance （MDR） position and profile is analyzed through the calculation of the scattering efficiency and asymmetry factors of the two-layer sphere. The results show that the position and size of the inclusion affect the MDR of eccentric sphere. Through the computation of the angle-averaged internal intensity, it is found that the MDR position and profile will be greatly affected by the incidence angles of plane wave when the inclusion is located near the position of concentrated intensity.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2013年第5期294-300,共7页
Acta Optica Sinica
基金
国家自然科学基金(61205191)
山东省自然科学基金(ZR2009AQ013)资助课题
关键词
光散射
形貌共振
偏心球
内场
light scattering
morphology-dependent resonance
eccentric sphere
internal field
