Patent ID: 7680162

Claim:
A surface emitting device comprising a lower mirror layer emitting light having a long wavelength, an active layer providing an optical gain, a tunnel junction layer for reducing an absorption loss of free carrier, and an upper mirror layer, which are sequentially stacked on a compound semiconductor substrate, wherein an aperture region is formed on a side surface of at least one of the active layer, the tunnel junction layer and the upper mirror layer by using etching process, and a heat release layer having greater thermal conductivity than at least one of the active layer, the tunnel junction layer and the upper mirror layer is formed in the aperture region, wherein the heat release layer comprises a dielectric layer and a metal layer, wherein the dielectric layer is deposited on an aperture region and the metal layer is deposited on the dielectric layer formed on the side surface, and wherein the dielectric layer is formed to have a smaller thickness than the thickness of the aperture region by using atomic layer deposition (ALD) or plasma enhanced atomic layer deposition (PEALD).