双折射手征晶体中的无衍射涡旋光束
Nondiffracting vortex-beams in a birefringent chiral crystal
摘要：
本文对旋光和线性双折射均为张量性质的手征晶体中的无衍射光束进行了矢量波分析，其本征模场满足矢量波方程。写出了本征模的特征方程，求出了本征模的传播常数和振幅参数。我们证明了本征模场在光束截面上是非均匀偏振的。我们已经发现，即使是没有线性双折射的纯手征晶体也可以在初始无涡旋的贝塞尔光束中产生光学涡旋。
英文摘要：
A vector wave analysis of nondiffracting beams propagating along a birefringent chiral crystal for the case of tensor character both of the optical activity and linear birefringence is presented, fields of eigen modes satisfying vector wave equation. We have written characteristic equations and found propagation constants and amplitude parameters of eigen modes. We have shown that the field of eigen modes is non-uniformly polarized in the beam cross-section. We have revealed that even a purely chiral crystal without a linear birefringent can generate optical vortices in an initially vortex-free Bessel beam.
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