Nonparaxial analyses of radially polarized beams diffracted at a circular aperture.
On the basis of the vectorial Rayleigh diffraction integral, the analytical expressions for the electromagnetic fields of the radially polarized beams diffracted at a circular aperture are derived, which helps us investigate the propagation properties of the apertured radially polarized beams in the nonparaxial and paraxial regimes. The unapertured and paraxial cases can be viewed as the special cases of the general result obtained in this paper. The analyses indicate that the nonparaxiality of the apertured radially polarized beams depends on the ratio of the waist width to the wavelength and the truncation parameter. In addition, the truncation parameter and the beam order have a great impact on the beam diffraction effect and the beam evolution behavior.
Jia
Xinting
X
Wuhan National Laboratory for Optoelectronics, College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Wang
Youqing
Y
Li
Bo
B
D000465:Algorithms; D055590:Electromagnetic Phenomena; D008027:Light; D015233:Models, Statistical; D016011:Normal Distribution; D055095:Optics and Photonics; D011827:Radiation; D012031:Refractometry / Q000379:methods; D012542:Scattering, Radiation