Semiconductor light-emitting device

A semiconductor light emitting device comprising:

• a semiconductor light emitting chip having a growth surface that is a nonpolar or semipolar plane, and emitting polarized light;
• and
• a reflection member having a plurality of reflective surfaces off which the polarized light is reflected, wherein
• at least part of light in a plane L90 is reflected off the reflective surfaces in a direction of a normal line to the growth surface, and an amount of light reflected off the reflective surfaces in the plane L90 in the direction of the normal line to the growth surface is larger than an amount of light reflected off the reflective surfaces in a plane L45 in the direction of the normal line to the growth surface, where the plane L90 represents a plane including the normal line to the growth surface of the semiconductor light emitting chip and oriented at an angle of 90° to a polarization direction of the polarized light, and the plane L45 represents a plane including the normal line, and oriented at an angle of 45° to the polarization direction of the polarized light,
• the reflective surfaces are arranged such that a shape formed by the reflective surfaces when viewed in plan is rectangular, and
• an angle θ2 is either not less than 0° and not more than 10° or not less than 85° and not more than 90°, where θ2 represents an angle between a polarization direction of the polarized light and a long side of the shape formed by the reflective surfaces when viewed in plan.