Share Email Print

Proceedings Paper

Red and orange resonant-cavity LEDs
Author(s): Ralph Wirth; Christian Karnutsch; Siegmar Kugler; Simone Thaler; Klaus P. Streubel
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Usually resonant-cavity light-emitting diodes (RCLEDs) are used as emitters for plastic optical fiber communication. However, there are some arguments that may lead to the introduction of RCLEDs in a much wider range of applications. A typical high-brightness AlGaInP LED consists of a Bragg mirror, the active region and some layers for current spreading and light extraction. The thickness of these layers can add up to several ten microns which causes long epitaxial growth times. The total thickness of a RCLED can be significantly lower. Furthermore, since no lattice mismatched layers such as GaP are involved, the total incorporated strain is low which simplifies wafer handling and device processing. For this reason we studied RCLEDs with a dominant wavelength around 632 nm (superred) and 605 nm (orange). The processes for epitaxial growth and chip fabrication were optimized for homogeneity on 4 inch wafers and suitability for low-cost mass production, respectively. Possible applications for our RCLEDs are optical scanners, indicators, signal lights and other applications which benefit from the enhanced directionality of RCLEDs.

Paper Details

Date Published: 14 May 2001
PDF: 9 pages
Proc. SPIE 4278, Light-Emitting Diodes: Research, Manufacturing, and Applications V, (14 May 2001); doi: 10.1117/12.426855
Show Author Affiliations
Ralph Wirth, OSRAM Opto Semiconductors (Germany)
Christian Karnutsch, OSRAM Opto Semiconductors (Germany)
Siegmar Kugler, OSRAM Opto Semiconductors (Germany)
Simone Thaler, OSRAM Opto Semiconductors (Germany)
Klaus P. Streubel, OSRAM Opto Semiconductors (Germany)

Published in SPIE Proceedings Vol. 4278:
Light-Emitting Diodes: Research, Manufacturing, and Applications V
H. Walter Yao; E. Fred Schubert, Editor(s)

© SPIE. Terms of Use
Back to Top