Vasilyeu Ruslan, Dudley Angela, Khilo Nikolai, Forbes Andrew
B.I. Stepanov Institute of Physics of NAS of Belarus, Nezalezhnasti Ave., 68, 220072 Minsk, Belarus.
Opt Express. 2009 Dec 21;17(26):23389-95. doi: 10.1364/OE.17.023389.
We report the first experimental generation of the superposition of higher-order Bessel beams, by means of a spatial light modulator (SLM) and a ring slit aperture. We present illuminating a ring slit aperture with light which has an azimuthal phase dependence, such that the field produced is a superposition of two or more higher-order Bessel beams. The experimentally produced fields are in good agreement with those calculated theoretically. The significance of these fields is that even though one is able to generate fields which carry zero orbital angular momentum, a rotation in the field's intensity profile as it propagates is observed.
我们报告了通过空间光调制器（SLM）和环形狭缝孔径首次实验产生高阶贝塞尔光束叠加的情况。我们展示了用具有方位角相位依赖性的光照射环形狭缝孔径，使得产生的场是两个或更多高阶贝塞尔光束的叠加。实验产生的场与理论计算结果吻合良好。这些场的重要意义在于，即使能够产生携带零轨道角动量的场，但在其传播过程中仍可观察到场的强度分布发生旋转。
