Optical detector and electronic apparatus including metasurface elements and complementary color filters for color separation

An electronic apparatus, comprising:

• an optical detector including:
• a photoelectric conversion layer that includes a plurality of photoelectric conversion elements in a matrix shape, wherein the plurality of photoelectric conversion elements is configured to generate, based on incident light, electric charges by photoelectric conversion;
• a filter layer including a plurality of complementary color filters, wherein
• the plurality of complementary color filters is on an incident surface of the photoelectric conversion layer,
• each complementary color filter of the plurality of complementary color filters is associated with a corresponding set of photoelectric conversion elements of the plurality of photoelectric conversion elements, and
• each complementary color filter of the plurality of complementary color filters is configured to block first light of a specific wavelength in the incident light;
• and
• a metasurface layer including a plurality of metasurface elements, wherein
• the plurality of metasurface elements is between the photoelectric conversion layer and the filter layer,
• each metasurface element of the plurality of metasurface elements is associated with the corresponding set of photoelectric conversion elements,
• each metasurface element of the plurality of metasurface elements includes a plurality of refractive index materials,
• the plurality of refractive index materials has:
• a plurality of different widths based on wavelengths of the incident light, and
• a pitch smaller than a target light wavelength associated with the incident light, and
• each metasurface element of the plurality of metasurface elements is configured to:
• separate, into components, second light of the incident light that has having passed through a complementary color filter of the plurality of complementary color filters, wherein
• the separation of the second light is based on wavelengths of the second light, and
• the separation of the second light into the components is via the plurality of refractive index materials of a corresponding metasurface element of the plurality of metasurface elements;
• and
• guide the components of the separated second light toward the corresponding set of photoelectric conversion elements.

An optical detector, comprising:

• a photoelectric conversion layer that includes a plurality of photoelectric conversion elements in a matrix shape, wherein the plurality of photoelectric conversion elements is configured to generate, based on incident light, electric charges by photoelectric conversion;
• a filter layer including a plurality of complementary color filters, wherein
• the plurality of complementary color filters is on an incident surface of the photoelectric conversion layer,
• each complementary color filter of the plurality of complementary color filters is associated with a corresponding set of photoelectric conversion elements of the plurality of photoelectric conversion elements, and
• each complementary color filter of the plurality of complementary color filters is configured to block first light of a specific wavelength in the incident light;
• a metasurface layer including a plurality of metasurface elements, wherein
• the plurality of metasurface elements is between the photoelectric conversion layer and the filter layer,
• each metasurface element of the plurality of metasurface elements is associated with the corresponding set of photoelectric conversion elements,
• each metasurface element of the plurality of metasurface elements includes a plurality of refractive index materials,
• the plurality of refractive index materials has:
• a plurality of different widths based on wavelengths of the incident light, and
• a pitch smaller than a target light wavelength associated with the incident light, and
• each metasurface element of the plurality of metasurface elements is configured to:
• separate, into components, second light of the incident light that has passed through a complementary color filter of the plurality of complementary color filters, wherein
• the separation of the second light is based on wavelengths of the second light, and
• the separation of the second light into the components is via the plurality of refractive index materials of a corresponding metasurface element of the plurality of metasurface elements;
• and
• guide the components of the separated second light toward the corresponding set of photoelectric conversion elements;
• and
• primary color filters between the metasurface layer and the photoelectric conversion layer, wherein
• each primary color filter of the primary color filters is associated with a respective photoelectric conversion element of the corresponding set of photoelectric conversion elements, and
• each primary color filter of the primary color filters is configured to allow third light of a specific wavelength in the separated second light to pass therethrough.