Method of manufacturing surface textured high-efficiency radiating devices and devices obtained therefrom
US6504180B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 26, 1999 |
| Grant date | Jan 7, 2003 |
| Priority date | — |
| Expiry date | Jul 26, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H29/142
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device for emitting radiation at a predetermined wavelength is presented. This device has a cavity with an active layer in which said radiation is generated by charge carrier recombination. The edges of the device define the region or space for radiation and/or charge carrier confinement. At least one of the edges of this cavity has a substantially random grating structure. The edge of the device has substantially random grating structure and can extend as at least one edge of a waveguide forming part of this radiation emitting device. The radiation emitting device of the present invention can have a cavity comprising a radiation confinement space that includes confinement features for the charge carriers confining the charge carriers to a subspace being smaller than the radiation confinement space within the cavity. The emitting device can comprise at least two edges forming, in cross-section, a substantially triangular shape. The angle between these two edges is smaller than 45°. At least one of the two edges has a transparent portion. the devices according to the present invention can be arranged in arrays.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.