Color splitter structure, method of manufacturing the same, image sensor including color splitter structure, and optical apparatus including image sensor

A color splitter comprising:

• a plurality of color splitter elements configured to divide an incident light into a plurality of exit lights according to wavelengths,
• wherein at least one of the color splitter elements comprises:
• a first element portion;
• a second element portion disposed to partially overlap with the first element portion;
• and
• an etch stop layer formed of a material having a predetermined etch selectivity with regard to the first element portion or the second element portion, and disposed between the first element portion and the second element portion,
• wherein a part of a surface of the etch stop layer is in direct contact with the second element portion and a rest of the surface of the etch stop layer is apart from the second element portion and in direct contact with a dielectric material;
• or a part of another surface of the etch stop layer is in direct contact with the first element portion and a rest of the other surface of the etch stop layer is apart from the first element portion and in direct contact with the dielectric material.