Patent ID: 8759929

Claim:
A solid-state imaging device comprising: a substrate including a light receiving section; and a color filter provided directly on the light receiving section, the color filter including a guided-mode resonant grating, wherein the guided-mode resonant grating includes dotted-like diffraction grating elements, the diffraction grating elements are periodically disposed in a first direction parallel to a major surface of the substrate and in a second direction parallel to the major surface of the substrate, and the second direction is perpendicular to the first direction, and a pitch of the diffraction grating elements is varied from 0.26 μm to 0.4 μm, at least one of an upper surface and a lower surface of the guided-mode resonant grating is covered with a layer having a lower refractive index than the diffraction grating elements, a first light in a particular wavelength range injected into the guided-mode resonant grating from the upper surface side transmits through the guided-mode resonant grating and reaches the light receiving section, as for a second light except the first light in a particular wavelength range injected into the guided-mode resonant grating from the upper surface side, a phase of the second light reflected by the guided-mode resonant grating toward the upper surface side and a phase of the second light guided in the guided-mode resonant grating and diffracted by the diffraction grating elements toward the upper surface side are same, a difference between a phase of the second light transmitted by the guided-mode resonant grating toward the lower surface side and a phase of the second light guided in the guided-mode resonant grating and diffracted by the diffraction grating elements toward the lower surface side are π, and a periodic number of the diffraction grating elements is 5 or more.