Focusing Properties of High Numerical Aperture Linearly Polarized Light with Axial Symmetry
Focusing properties of high numerical aperture linearly polarized light with axial symmetry are studied in the paper. The geometry and mathematical expression are presented first. The mathematical expression is more universal, which make us to derive easily the previous expression for radially polarized light and azimuthally polarized light. We simulate the focusing field distribution for zero original angle with different polarization order number P. we find out some unique focusing properties, such as petaline field distribution and the on-axis energy null, and the number of petal is dependent on P in the manner of 2(P-1). In addition, we find out the field energy dispersion near focus with the increase of P. All these properties are different from those for radially or azimuthally polarized light. These focusing properties have possible applications in data storage, lithography, material processing, electron acceleration, scanning microscopy as well as particle trapping.
high numerical aperture polarized light beam shaping material processing particle trapping
Zhou Zhehai Wang Xiaoling Niu Chunhui
School of Optoelectronics Information and Communication Engineering,Beijing Information Science Technology University,Beijing 100192 China
国际会议
北京
英文
2008-11-01（万方平台首次上网日期，不代表论文的发表时间）