A new definition of the degree of paraxiality for vector light beams

作者：Wang Ting Ting; Li Chun Fang^*

来源：Physics Letters A, 2012, 376(20): 1714-1716.

DOI：10.1016/j.physleta.2012.04.001

• Vector light beams
• Beam propagation
• Paraxiality

A parameter, called the degree of paraxiality, is introduced upon examining the property of energies originating from the longitudinal as well as the transverse components of both the electric and magnetic fields. It is shown that this degree of paraxiality is determined by the magnitude of the plane-wave spectrum, without depending on the vectorial feature of the plane-wave spectrum. Its value ranges from 0 to 1. A larger value stands for a more paraxial beam. As an application, two examples are considered.

• 出版日期2012-4-16
• 单位上海大学