Abstract:
A hybrid vertical cavity laser comprises: an optical circuit template including a grating having a lower refractive index unit and a higher refractive index unit that are alternately arranged in a first direction, and a waveguide guiding light in the first direction; a mesa structure including a first-type semiconductor layer, an active layer, a second-type semiconductor layer, and an upper reflective layer that are sequentially stacked on the optical circuit template in a second direction perpendicular to the first direction, wherein the first-type semiconductor layer, active layer, second-type semiconductor layer, and upper reflective layer are a mesa-etched and protrude in order for a portion of the first-type semiconductor layer to be exposed; a first electrode formed on the exposed mesa-etched surface of the first-type semiconductor layer; and a second electrode formed on the upper reflective layer. When an overlapped length between the waveguide and a mesa aperture forming an opening through which light produced from the active layer enters the grating is D, a pitch of the grating is p, the condition 0