Title :
Increased light extraction from a light-emitting diode using a two-dimensional photonic crystal
Author :
Erchak, A.A. ; Ripin, D.J. ; Fan, S. ; Petrich, G.S. ; Joannopoulos, John D. ; Kolodziejski, Leslie A. ; Ippen, E.P.
Author_Institution :
Res. Lab. of Electron., MIT, Cambridge, MA, USA
Abstract :
Summary form only given. Enhanced light extraction is obtained from a light-emitting diode (LED) containing a two-dimensional (2D) photonic band gap (PBG) crystal. The 2D photonic crystal prohibits the propagation of light within a certain range of frequencies in the plane of the PBG. Several methods to modify light emission using a 2D photonic crystal have been studied. A 2D PBG is fabricated in the top cladding layer of an InGaP/InGaAs quantum well structure that emits at /spl lambda/=980 nm. The photonic crystal is designed such that the emission wavelength lies inside the photonic band gap eliminating the coupling to lateral guided modes within the semiconductor, that is a major source of loss in conventional LEDs. In our experiments, the surface normal photoluminescence (PL) at 980 nm is enhanced by a factor of 6 in the presence of a photonic crystal.
Keywords :
III-V semiconductors; chemical beam epitaxial growth; electron beam lithography; gallium arsenide; gallium compounds; indium compounds; light emitting diodes; optical fabrication; optical losses; optical materials; photoluminescence; photonic band gap; quantum well devices; semiconductor heterojunctions; semiconductor quantum wells; sputter etching; 2D photonic crystal; 980 nm; InGaP-InGaAs; InGaP/InGaAs quantum well structure; emission wavelength; enhanced light extraction; fabrication; lateral guided modes; light emission; light extraction; light-emitting diode; loss; photonic band gap; photonic crystal; surface normal photoluminescence; top cladding layer; two-dimensional photonic band gap crystal; two-dimensional photonic crystal; Band pass filters; Dielectric thin films; Etching; Laboratories; Lattices; Light emitting diodes; Optical films; Photonic band gap; Photonic crystals; Resonance;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 2000. (QELS 2000). Technical Digest
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
1-55752-608-7
