Light-emitting device

A light-emitting device comprising:

• a semiconductor light-emitting device having a light output surface and outputting light in a direction inclined with respect to a normal direction of the light output surface;
• and
• a reflection type spatial light modulator having a light input/output surface arranged so as to be partially face the light output surface, the reflection type spatial light modulator modulating at least one of a phase and an intensity of the light from the semiconductor light-emitting device inputted through the light input/output surface and outputting the modulated light from the light input/output surface,
• wherein the semiconductor light-emitting device comprises:
• a semiconductor substrate having a main surface and a back surface opposing the main surface;
• a semiconductor laminate portion including an active layer, a phase modulation layer, an upper surface, and a lower surface, the upper surface and the lower surface arranged to sandwich the active layer and the phase modulation layer, the semiconductor laminate portion arranged on the main surface of the semiconductor substrate such that the lower surface faces the main surface;
• a first electrode provided on the upper surface of the semiconductor laminate portion;
• and
• a second electrode provided on the back surface of the semiconductor substrate,
• wherein the light output surface of the semiconductor light-emitting device facing to the reflection type spatial light modulator is included in the upper surface of the semiconductor laminate portion or the back surface of the semiconductor substrate,
• wherein the phase modulation layer includes a base layer having a predetermined refractive index and a plurality of modified refractive index regions having a refractive index different from the refractive index of the base layer,
• wherein an area of the light output surface of the semiconductor light-emitting device is smaller than an area of the light input/output surface of the spatial light modulator, and
• wherein the plurality of modified refractive index regions are arranged so as to avoid a space through which the modulated light from the reflection type spatial light modulator passes.