| 摘要 |
According to one embodiment, a semiconductor light emitting device includes a light emitting layer, a first layer, a second layer and a distributed Bragg reflector. The light emitting layer has a first and second surfaces and is capable of emitting emission light having a peak wavelength in a range of 740 nm or more and 830 nm or less. The first layer is provided on a side of the first surface and has a light extraction surface. The second layer is provided on a side of the second surface. The distributed Bragg reflector layer is provided on a side of the second layer. A third and fourth layers are alternately stacked. The distributed Bragg reflector layer is capable of reflecting the emission light toward the light extraction surface. The third and fourth layers each have a bandgap wavelength shorter than the peak wavelength. |
