Patent ID: 7768023
Filing Date: 2010-08-03
Classification: B82Y,G02B,H01L

Abstract:
1. A high efficiency light emitting diode (LED) comprising: (a) a substrate; (b) a first active region, formed on the substrate, and including one or more primary emitting species (PES) that are electrically-injected; (c) one or more photonic crystals, formed on the first region; and (d) a second active region, formed on the photonic crystals, and including one or more secondary emitting species (SES) that are optically-pumped; (e) wherein the photonic crystals extract waveguided modes emitted by the PES to optically pump the SES and the photonic crystals extract waveguided modes emitted by the SES; and (f) wherein the photonic crystals are chosen to increase the extraction of waveguided modes from both the PES and SES.