Semiconductor light-emitting device

摘要

A semiconductor light-emitting device includes: a semiconductor chip having a nonpolar plane as a growth surface and configured to emit polarized light; and a reflector having a reflective surface. When a plane forming an angle of 45° relative to a direction of polarization of the polarized light is a plane L45, the reflective surface of the reflector reflects at least a part of light in the plane L45 in a normal line direction of the growth surface of the semiconductor light-emitting chip. The reflector includes a plurality of reflective surfaces, the plurality of reflective surfaces are arranged in a shape of a square in plan view, and when an angle between the direction of polarization of the polarized light and one side of the shape formed by the plurality of reflective surfaces is θ2, the angle θ2 is not less than 17° and not more than 73°.

主权项

1. 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 reflective surface off which the polarized light is reflected, wherein the reflective surface reflects at least a part of light in a plane L45 in a normal line direction of the growth surface of the semiconductor light-emitting chip, where the plane L45 represents a plane oriented at an angle of 45° to a polarization direction of the polarized light; the reflective surface of the reflection member includes a plurality of reflective surfaces; the plurality of reflective surfaces are arranged such that a shape formed by the reflective surfaces when viewed in plan is square; an angle θ2 is not less than 17° and not more than 73°, where the angle θ2 is an angle between the direction of polarization of the polarized light and a side of the shape formed by the reflective surfaces; the semiconductor light-emitting chip includes at least four semiconductor light-emitting chips; the at least four semiconductor light-emitting chips are arranged in a matrix such that directions of polarization of light from the at least four semiconductor light-emitting chips are identical; and D2 is less than D1, where D1 represents a distance between adjacent two of the at least four semiconductor light-emitting chips arranged in a direction perpendicular to the directions of polarization of the light, and D2 represents a distance between adjacent two of the at least four semiconductor light-emitting chips arranged in a direction parallel to the directions of polarization of the light.