The nonparaxial propagation of the TEM_0l doughnut beam with the orbital angular momentum in the far field

详细信息    查看全文

• 作者：Zhengling Wang ; Ming Zhou ; Wei Zhang ; Chuanyu Gao ; Guorong Cao
• 刊名：Optics Communications
• 出版年：2010
• 出版时间：15 October 2010
• 年：2010
• 卷：283
• 期：20
• 页码：3874-3877
• 全文大小：462 K

文摘

The analytical expression for nonparaxial electric field amplitude of the TEM_0l doughnut beam with the orbital angular momentum quantum number l is derived in the far field by means of the angular spectrum representation and the stationary phase method. It is shown that the divergent angle of the far field of TEM_0l doughnut beam will be smaller with the decreasing of the orbital angular momentum quantum number l or the increasing of the beam waist width w of the initial beam. And the maximal radial intensity of the beam is decreased with its propagation at different rates for different l and w.