Vectorial structure of helical hollow Gaussian beams in the far field |
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| Authors: | Huiqin Tang Guoquan Zhou |
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| Institution: | a School of Physical Science and Technology, Central South University, Changsha 410083, Hunan Province, China
b Department of Information Physics, Zhejiang Forestry University, Linan 310030, Zhejiang Province, China |
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| Abstract: | The analytical vectorial structure of helical hollow Gaussian beam (HHGB) is investigated in the far field based on the vector plane wave spectrum and the method of stationary phase. The energy flux distributions of HHGB in the far-field, which is composed of TE term with the electric field transverse to the propagation axis, and TM term with the magnetic field transverse to the propagation axis, are demonstrated. The physics pictures of HHGB is illustrated from the vectorial structure, which is important to understand the theoretical aspects of both scalar and vector HHGB propagation. |
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| Keywords: | Beam propagation Vectorial structure Helical hollow Gaussian beam (HHGB) Far field |
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