Temperature-controlled vector vortex beam detector, preparation method thereof and detection device

Abstract

The embodiment of the invention discloses a temperature-controlled vector vortex beam detector, a preparation method thereof and a detection device. The vector vortex beam detector comprises a first liquid crystal box and a second liquid crystal box which are cascaded; the first liquid crystal box comprises a first substrate, a second substrate and a temperature-controlled first turning cholesteric liquid crystal layer which are oppositely arranged, a first orientation layer is arranged on the side, facing the second substrate, of the first substrate, and a second orientation layer is arranged on the side, facing the first substrate, of the second substrate; and the second liquid crystal box comprises a third substrate, a fourth substrate and a temperature-controlled second turning cholesteric liquid crystal layer, the third substrate and the fourth substrate are oppositely arranged, a third orientation layer is arranged on the side, facing the fourth substrate, of the third substrate, and a fourth orientation layer is arranged on the side, facing the third substrate, of the fourth substrate. According to the technical scheme provided by the embodiment of the invention, the device integration level, the detection efficiency and the detection wave band adjustability of vector vortex beam detection can be improved, and selective detection of the circular polarization component is realized.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of microstructured liquid crystals and vector vortex beams, in particular to a temperature-controlled vector vortex beam detector, a preparation method thereof, and a detection device. Background technique [0002] Vector vortex light with helical phase and spatially inhomogeneous polarization distribution exhibits nontrivial coupling of spin angular momentum and orbital angular momentum. Vector vortex light has a wide range of applications in super-resolution microscopy, extremely wideband communication, and quantum information processing. The detection of vector vortex light is an indispensable key technology for the above applications. An effective solution to detect vector vortex light is to measure the vortex topological charges carried by its right-handed circular polarization component and left-handed circular polarization component respectively. [0003] The interferometer-bas...

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Problems solved by technology

[0003] The interferometer-based interferometry method or lens-based astigmatic transformation measurement method is suitable for measuring the topological charge of vortex beams, but generally does not have circular polarization selectivity, which is not conducive to detecting the two components of vector vortex light

The detection system based on cascaded spatial light modulators has the disadvantages of complex optical path and low efficiency

Metamaterial devices have polarization dependence and are suitable for the detection of vector vortex light, but the processing is difficult, and there are certain limitations in the adjustability of the detection band

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