Abstract
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.
© 2020 Chinese Laser Press
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