The nonparaxial propagation of the TEM0l
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Zhengling Wang; Ming Zhou; Wei Zhang; Chuanyu Gao; Guorong Cao
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Article
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2010
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Elsevier Science
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English
โ 462 KB
The analytical expression for nonparaxial electric field amplitude of the TEM 0l โ 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