Disclosed is an integrated circuit (100) comprising a substrate (110) carrying a plurality of light-sensitive elements (112) and a blazed grating (120) comprising a plurality of diffractive elements (122) for diffracting respective spectral components (123-125) of incident light (150) to respective light-sensitive elements (112), the blazed grating (120) comprising a stack of layers, at least some of these layers comprising first portions, e.g. metal portions (202, 222, 242) arranged such that each diffractive element (122) comprises a stepped profile of stacked first portions with a first portion in a higher layer laterally extending beyond a first portion in a lower layer of said stepped profile.