14 April 1999 Infrared light-emitting diodes with lateral outcoupling taper for high extraction efficiency
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Abstract
We present a non-resonant light emitting diode with a novel concept of light outcoupling. Light is generated in the center of a radially symmetric structure and propagates between two mirrors of a tapered region where outcoupling occurs. Principles of outcoupling are given using a simple ray tracing model. Different process routes are developed resulting in on-substrate as well as substratless devices. Not yet optimized devices show quantum efficiencies of 12% and 15%, respectively.
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Wolfgang Schmid, Franz Eberhard, Markus Schauler, Martin Grabherr, Roger King, Michael Miller, Eckard Deichsel, G. Stareev, Ulrich Martin, Roland Jaeger, J. Joos, Rainer Michalzik, Karl Joachim Ebeling, "Infrared light-emitting diodes with lateral outcoupling taper for high extraction efficiency", Proc. SPIE 3621, Light-Emitting Diodes: Research, Manufacturing, and Applications III, (14 April 1999); doi: 10.1117/12.344478; https://doi.org/10.1117/12.344478
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KEYWORDS
Light emitting diodes

Mirrors

Ray tracing

Reflectivity

Quantum efficiency

Reflection

Gold

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