High quantum efficiency photon-number-resolving detector for photonic on-chip information processing by Calkins, B, Mennea, L, Lita, A, Metcalf, B, Kolthammer, W, Linares, A, Spring, J, Humphreys, P, Mirin, R, Gates, J, Smith, P, Walmsley, I, Gerrits, T, Nam, S