学术
摘 要:
文章以平面波的微小圆孔衍射为例，对矢量衍射场的级数解、非傍轴近似解以及精确积分解进行了详尽的数值计算，并对级数解、非傍轴近似解的有效性作了定性分析和比较研究。结果表明，平面波经微小圆孔衍射的级数解、非傍轴近似解的有效性与级数解阶次、光阑孔径及传播距离有关，2种解的有效适用范围具有一定的互补性；当光阑孔径与波长相当或小于波长时，衍射场的纵向分量不能忽略，必须考虑光场的矢量非傍轴特性。[著者文摘]
文章出处:
《合肥工业大学学报：自然科学版》-2008年31卷2期 -309-312页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1003-5060（2008）02-0309-04
Comparative study of vectorial diffraction theories for plane waves diffracted at a small circular aperture
LIU Cai-xia, WANG Fei, XIAO Su, HU Ji-gang （Dept. of Applied Physics, Hefei University of Technology, Hefei 2a0009, China）
Abstract:
Detailed numerical calculation of the series expansion solution, non-paraxial approximation solution and exact solution of vectorial plane waves diffracted at a small circular aperture is made, the validity of the series expansion solution and the non-paraxial approximation solution is studied, and illustrative numerical examples are given. It is shown that the validity of the series expansion solution and the non-paraxial approximation solution depends on the order of the series expansion solution, the aperture size and the propagation distance, and they are complementary to each other. The vectorial non-paraxial behavior should be taken into consideration and the longitudinal component can not be neglected once the aperture size is comparable with or less than the wavelength.[著者文摘]
Key words:
physical optics; vectorial diffraction theory; plane wave; circular aperture diffraction; validity
基金资助:
合肥工业大学科研发展基金资助项目（061001F）
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