|
|||||
|
|
Nonparaxial diffraction of vectorial plane waves at a small aperture |
|
| Authors: | Kailiang Duan Baida Lü |
| Affiliation: | a Department of Physics, Luoyang Normal College, Luoyang 471022, China;b Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064, China;c State Key Laboratory of Laser Technology (Huazhong University of Science and Technology), Wuhan 430074, China |
| Abstract: | By using the vectorial Rayleigh diffraction integrals, a nonparaxial propagation equation of vectorial plane waves diffracted at a small rectangular aperture is derived analytically and some special cases are discussed. Numerical calculation results are given to illustrate the applicability and validity of our theoretical formulae. It is shown that for the apertured case the ratio of the aperture width and wavelength affects the beam nonparaxiality. The nonparaxial approach presented in this paper has to be used for diffracted plane waves if the aperture width is comparable with or less than the wavelength. |
| Keywords: | Nonparaxial propagation equation Diffraction at a small rectangular aperture Relative aperture width Vectorial Rayleigh diffraction integrals |
| 本文献已被 ScienceDirect 等数据库收录！ | |
