Light emitting device and projector

A light emitting device comprising:

• a substrate;
• and
• a stacked body provided to the substrate, and including a plurality of first columnar parts, wherein
• the stacked body includes
• a first semiconductor layer,
• a second semiconductor layer different in conductivity type from the first semiconductor layer, and
• a light emitting layer disposed between the first semiconductor layer and the second semiconductor layer,
• the first semiconductor layer and the light emitting layer constitute the first columnar parts,
• the first semiconductor layer is disposed between the substrate and the light emitting layer,
• the second semiconductor layer is provided with a plurality of recessed parts,
• the recessed part is provided with a low refractive-index part lower in refractive index than the second semiconductor layer,
• the plurality of the first columnar parts constitutes a first photonic crystal,
• the second semiconductor layer and the low refractive-index parts constitute a second photonic crystal, and
• the first photonic crystal and the second photonic crystal are optically coupled to each other,
• wherein the second semiconductor layer has a portion disposed so as to straddle the plurality of the first columnar parts.