Light-emitting device and image display apparatus using the same

A light-emitting device comprising:

• a light-emitting layer;
• and
• a fine structure layer that opposes the light-emitting layer, light generated in the light-emitting layer passing through the fine structure layer,
• wherein the fine structure layer includes
• a plurality of first medium portions, and
• a second medium region, the second medium region having a refractive index different from a refractive index of the first medium portions,
• wherein the plurality of first medium portions are each surrounded by the second medium region in an in-plane direction of the fine structure layer,
• wherein each first medium portion is formed to have a rotated ellipsoidal shape, the rotated ellipsoidal shape having a major axis that extends in a direction perpendicular to a surface that opposes the light-emitting layer, the rotated ellipsoidal shape being defined by a path of an ellipse rotated about the major axis as a rotation axis.