Abstract: Provided is a vapor phase epitaxy apparatus for a III nitride semiconductor, including a susceptor for holding a substrate, an opposite face of the susceptor, a heater for heating the substrate, a raw material gas-introducing portion provided at the central portion of the susceptor, and a reactor formed of a gap between the susceptor and the opposite face of the susceptor, in which a distance between the installed substrate and the opposite face of the susceptor is extremely narrow, and a constitution through which a coolant is flown is provided for the opposite face of the susceptor. The vapor phase epitaxy apparatus further includes, on the opposite face of the susceptor, a fine porous portion for ejecting an inert gas toward the inside of the reactor and a constitution for supplying the inert gas to the fine porous portion.

Abstract: An off-axis cut of a nonpolar III-nitride wafer towards a polar (?c) orientation results in higher polarization ratios for light emission than wafers without such off-axis cuts. A 5° angle for an off-axis cut has been confirmed to provide the highest polarization ratio (0.9) than any other examined angles for off-axis cuts between 0 and 27°.

Abstract: An increase in the Indium (In) content in light-emitting layers of light-emitting diode (LED) structures prepared on nonpolar III-nitride substrates result in higher polarization ratios for light emission than LED structures containing lesser In content. Polarization ratios should be higher than 0.7 at wavelengths longer than 470 nm.

Abstract: A gallium nitride (GaN) based light emitting device, wherein the device comprises a first surface and a second surface, and the first surface and second surface are separated by a thickness of less than 100 micrometers, and preferably less than 20 micrometers. The first surface may be roughened or textured. A silver or silver alloy may be deposited on the second surface. The second surface of the device may be bonded to a permanent substrate.

Abstract: An (Al,Ga,In)N-based light emitting diode (LED), comprising a p-type surface of the LED bonded with a transparent submount material to increase light extraction at the p-type surface, wherein the LED is a substrateless membrane.

Abstract: A nonpolar III-nitride film grown on a miscut angle of a substrate. The miscut angle towards the <000-1> direction is 0.75° or greater miscut and less than 27° miscut towards the <000-1> direction. Surface undulations are suppressed and may comprise faceted pyramids. A device fabricated using the film is also disclosed. A nonpolar III-nitride film having a smooth surface morphology fabricated using a method comprising selecting a miscut angle of a substrate upon which the nonpolar III-nitride films are grown in order to suppress surface undulations of the nonpolar III-nitride films. A nonpolar III-nitride-based device grown on a film having a smooth surface morphology grown on a miscut angle of a substrate which the nonpolar III-nitride films are grown. The miscut angle may also be selected to achieve long wavelength light emission from the nonpolar film.

Abstract: A III-nitride film, grown on an m-plane substrate, includes multiple quantum wells (MQWs) with a barrier thickness of 27.5 nm or greater and a well thickness of 8 nm or greater. An emission wavelength can be controlled by selecting the barrier thickness of the MQWs. Device fabricated using the III-nitride film include nonpolar III-nitride light emitting diodes (LEDs) with a long wavelength emission.

Abstract: A nonpolar III-nitride film grown on a miscut angle of a substrate, in order to suppress the surface undulations, is provided. The surface morphology of the film is improved with a miscut angle towards an a-axis direction comprising a 0.15° or greater miscut angle towards the a-axis direction and a less than 30° miscut angle towards the a-axis direction.