US Patent 7760973 Light emitting device using three-dimensional photonic crystal

In a light emitting device, efficiency and stability are improved. A light emitting device 10 includes a three-dimensional photonic crystal 20. The three-dimensional photonic crystal includes a first defect part 70 forming a resonator including an active medium, a second defect part 80 forming a waveguide for taking out light generated by the resonator, a P clad part 40 formed of a P-type semiconductor, and a N clad part 50 formed of a first N-type semiconductor. The second defect part is provided only in the N clad part among the P clad part and the N clad part. At least a part of the second defect part is formed of a second N-type semiconductor and constitutes a heat radiation unit which radiates a heat to the outside.