Analytically vectorial structure of an apertured Laguerre-Gaussian beam in the far-field |
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Authors: | Guoquan Zhou |
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Affiliation: | School of Sciences, Zhejiang Forestry University, Lin'an 311300, Zhejiang Province, China |
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Abstract: | Based on the angular spectrum representation of an arbitrary electromagnetic beam and the method of stationary phase, an analytically vectorial structure of an apertured Laguerre-Gaussian beam in the far-field has been derived without any approximation. The analytical expressions of the energy flux of the TE term, the TM term, and the apertured Laguerre-Gaussian beam are also presented in the far-field, respectively. The energy flux distributions of the TE term, the TM term, and the apertured Laguerre-Gaussian beam are numerically demonstrated in the far-field reference plane. The influences of the f-parameter, the truncation parameter, the radial and angular mode numbers, and the dependent relation of angle on the energy flux distributions in the far-field of the TE term, the TM term, and the apertured Laguerre-Gaussian beam are also discussed in detail. |
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Keywords: | Vectorial structure Laguerre-Gaussian beam Aperture |
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