Spherulites are crystals with cylindrical crystalline structures and thus exhibit anisotropic optical properties with cylindrical symmetry. Using spherulites, we obtain cylindrical vector optical vortex beams generation and modulations through the spin/orbit conversion. This strategy provides promising opportunities for the spherulite applications in structured light fields.
In this work, we experimentally demonstrate the Dyakonov surface wave mode at visible frequency in a hyperbolic
metasurface. The extremely strong anisotropy of the hyperbolic metasurface enables two Dyakonov surface waves on the
two surfaces of the hyperbolic metasurface. Strong coupling between the two surface waves forms a Dyakonov type
surface wave mode, which is highly directional and lossless, and has significant applications in two-dimensional photonic
circuits and devices.
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