PT Journal AU Contreras, T Martins, A Stanford, C Escobar, CO Guenette, R Stancari, M Martin-Albo, J Lawrence-Sanderson, B Para, A Kish, A Kellerer, F TI A method to characterize metalenses for light collection applications SO Journal of Instrumentation JI J. Instrum. PY 2023 BP T09004 - 11pp VL 18 IS 9 DI 10.1088/1748-0221/18/09/T09004 AB Metalenses and metasurfaces are promising emerging technologies that could improve light collection in light collection detectors, concentrating light on small area photodetectors such as silicon photomultipliers. Here we present a detailed method to characterize metalenses to assess their efficiency at concentrating monochromatic light coming from a wide range of incidence angles, not taking into account their imaging quality. ER