本文简单介绍了光场角动量的基本定义与概念,各类圆对称光束的角动量.同时,光束角动量能通过π/2模式转换器产生,由此修正光束的位相结构.光的吸收可以同时导致光束的自旋角动量或轨道角动量转移给微米粒子,就像光学镊子一样引起粒子的转动,从而形成光学扳手.另外,简单介绍了圆对称光束作为光学镊子和光学扳手在微米粒子和生物细胞的光学导引、囚禁与操控等领域中的应用.
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