Chinese Optics Letters, Vol. 18, Issue 11, 110503 (2020)
Experimental demonstration of generating arbitrary total angular momentum states
Heng Zhou1,2, Chunqing Gao1,2, Shiyao Fu1,2,*, Yanwang Zhai1,2, and Jianqiang Zhang1,2
- 1School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
- 2Key Laboratory of Photoelectronic Imaging Technology and System, Ministry of Education, Beijing 100081, China
We experimentally demonstrated an approach to generate arbitrary total angular momentum (TAM) states by using two liquid crystal devices. Photons’ TAM, the sum of spin and orbital angular momenta (SAM and OAM) under paraxial approximation, has found many applications in optics and attracted increasing attention in recent years. Our approach is based on the orthogonality of two eigen SAM components, that arbitrary TAM states will be produced through encoding different holograms in one system. The comparison with theoretical predications yields an excellent agreement, including both the separable state and the non-separable state. The proposed scheme takes a step forward for generating complex structured fields and broadens its application to various fields like laser processing and large capacity data transmission.
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