Patent ID: 8647903

Claim:
A method of fabricating an optical device integrated with an antireflective grating pattern, comprising: sequentially stacking an n-type doping layer, an active layer, and a p-type doping layer, stacking a p-type upper electrode on a top surface of the p-type doping layer except an emission portion, and stacking an n-type lower electrode on a bottom surface of the n-type doping layer; and forming a wedge-type or parabola-type antireflective subwavelength grating (SWG) pattern having a pointed tip only on a top surface of the emission portion of the p-type doping layer by: forming a photoresist (PR) pattern on the top surface of the emission portion of the p-type doping layer using a hologram lithography process; forming a PR lens pattern having a predetermined radius of curvature by reflowing the PR pattern by applying heat to the PR pattern; and etching the PR lens pattern to form the wedge-type or parabola-type antireflective subwavelength grating (SWG) pattern, wherein each of a period and depth of the antireflective subwavelength grating (SWG) pattern ranges from about 300 to 500 nm.