Abstract：
:Recently, based on space-variant Pancharatnam-Berry (PB) phases, various flat devices allowing abrupt changes of beam parameters have been predicted and demonstrated to implement intriguing manipulation on spin states in three dimensions, including the efficient generation of vector beams, spin Hall effect of light and light-guiding confinement, and so on. Here, we report on the construction of independently controllable multiple focal spots with different inhomogeneous polarization states by utilizing segmented PB phases. Combining the phase shift approach with PB phases, we engineer fan-shaped segmented PB phases and encode them onto two spin components that compose a hybrid polarized vector beam in a modified common-path interferometer system. Experimental results demonstrate that the fan-shaped segmented PB phase enables the flexible manipulation of focal number, array structure and polarization state of each focal spot. Furthermore, we demonstrate that this fan-shaped approach enables to flexibly tailor the polarization state and the spin angular momentum distribution of a tightly focused field, which have potential applications in optical manipulation, tailored optical response and imaging etc.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Li P,Guo X,Qi S,Han L,Zhang Y,Liu S,Li Y,Zhao Jdoi
10.1038/s41598-018-28186-3subject
Has Abstractpub_date
2018-06-29 00:00:00pages
9831issue
1issn
2045-2322pii
10.1038/s41598-018-28186-3journal_volume
8pub_type
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