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Approximate analytical expressions of apertured broadband beams in the far field |
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| Authors: | Lu Shi-Zhuan You Kai-Ming Chen Lie-Zun and Wang You-Wen |
| Institution: | National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China;Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China;Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China;Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China;Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China |
| Abstract: | The approximate analytical expressions of the apertured broadband beams in the far field with Gaussian and Laguerre--Gaussian spatial modes are presented. For the radially polarized Laguerre--Gaussian beam, the result reveals that the electromagnetic field in the far field is transverse magnetic. The influences of bandwidth (Γ) and truncation parameter (C0) on the transverse intensity distribution of the Gaussian beam and on the energy flux distribution of radially polarized Laguerre--Gaussian beam are analysed. |
| Keywords: | broadband beams Laguerre--Gaussian beam apertured |
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