Patent ID: 8558264

Claim:
A light-emitting device comprising: a first layer having a first surface; a second layer having a second surface that faces the first surface; and a semiconductor body interposed between the first surface and the second surface, wherein the semiconductor body has a first fine-wall-shape member, a second fine-wall-shape member, and a semiconductor member, the first fine-wall-shape member and the second fine-wall-shape member having: a third layer adjacent to the first surface; a fourth layer adjacent to the second surface; and a fifth layer interposed between the third layer and the fourth layer, the semiconductor member is interposed between the first fine-wall-shape member and the second fine-wall-shape member, the first layer and the second layer are made of GaN, the third layer, the fourth layer, the fifth layer, and the semiconductor member are made of In x Ga 1-x N (0<x<1), a value x of the fifth layer is larger than values x of the third layer, the fourth layer, and the semiconductor member, the fifth layer generates and guides light, the third layer and the fourth layer guide the light generated in the fifth layer, the first layer and the second layer suppress leakage of the light generated in the fifth layer, a waveguide through which the light generated in the fifth layer propagates intersects with the first fine-wall-shape member and the second fine-wall-shape member as seen in a plan view from a direction normal to the first surface, lengths of the first fine-wall-shape member and the second fine-wall-shape member in an extending direction of the waveguide are set to λ/2n 1 , and a length of the semiconductor member in an extending direction of the waveguide is set to λ/2n 2 , where λ is a wavelength of the light generated in the fifth layer, n 1 is an effective refractive index of the first fine-wall-shape member and the second fine-wall-shape member, and n 2 is an effective refractive index of the semiconductor member.