Almost pure TM or TE component far field in vector cosine-Gaussian beams

The vectorial structure of cosine-Gaussian beams (cGBs) is investigated in the far field regime based on the vector plane wave spectrum and the method of stationary phase. The energy flux densities of TE or TM term and the ratio of the energy flux of TE or TM term in the whole beam are demonstrated....

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Bibliographic Details
Published in:Journal of Central South University 2012-08, Vol.19 (8), p.2167-2172
Main Authors: Zhu, Kai-cheng, Yu, Yan, Tang, Hui-qin
Format: Article
Language:English
Subjects:
Engineering
Metallic Materials
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Summary:The vectorial structure of cosine-Gaussian beams (cGBs) is investigated in the far field regime based on the vector plane wave spectrum and the method of stationary phase. The energy flux densities of TE or TM term and the ratio of the energy flux of TE or TM term in the whole beam are demonstrated. It is found that the spot configurations of the energy flux densities associated with the TE and TM terms depend on the polarization angle and the beam parameter of the incident cGB. And the far field may be entirely transverse magnetic or transverse electric under appropriate polarization angle and beam parameter.
ISSN:2095-2899
2227-5223
DOI:10.1007/s11771-012-1260-6