Freeform Metasurface-Assisted Waveguide Coupler for Guided Wave Polarization Manipulation and Spin–Orbit Angular Momentum Conversion
Tianqu Chen,
Mingfeng Xu,
Mingbo Pu
et al.
Abstract:Metasurface integrated waveguide couplers provide a promising pathway toward advanced manipulation of free-space light for guided wave coupling, such as polarization routing, modeselective coupling, and wavelength (de)multiplexing. However, it is a great challenge to manipulate the guided wave polarization state to be completely decoupled from the polarization of incident light.Here, an adjoint-based topology optimization method is employed to inversely design a freeform metasurface for unidirectionally coupli… Show more
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