Opportunities for next generation vector vortex waveplates

Vector vortex waveplates (VVWs) are highly promising technology enabling astronomical coronagraph masks for exoplanet imaging and characterization. Currently, the technology basics are well known, and there have been successful demonstrations of VVWs meeting several key operational requirements. The next generation of VVWs under development will make it possible to extend their spectral range of performance into infrared, further increase the contrast using novel materials, and would simplify manufacturing to reduce cost and increase yield and quality. We study design concepts for extending the bandwidth of VVWs, and analyze the fabrication tolerances that must be met in order to achieve wider bandwidths. Furthermore, we will discuss opportunities of integrating VVW technology with other planar optics functions to improve performance and reduce size and weight of the coronagraphs.