High extraction efficiency,laterally injected,light emitting diodes combining microcavities and photonic crystals |
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| Authors: | Rattier Maxime Krauss Thomas F Carlin Jean-François Stanley Ross Oesterle Ursula Houdré Romuald Smith Christopher JM De La Rue Richard M Benisty Henri Weisbuch Claude |
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| Institution: | (1) Laboratoire de Physique de la Matière Condensée, Ecole Polytechnique, F-91128 Palaiseau Cedex, France;(2) School of Physics and Astronomy, University of St Andrews, St Andrews, Fife, KY16 9SS Scotland, United Kingdom;(3) Institut de Micro- et Opto-électronique, Ecole Polytechniqe Fédérale de Lausanne, CH-1015 Lausanne, Switzerland;(4) Department of Electronics and Electrical Engineering, University of Glasgow, Glasgow, G12 8LT, Scotland, United Kingdom;(5) Laboratoire de Physique de la Matière Condensée, Ecole Polytechnique, F-91128 Palaiseau Cedex, France |
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| Abstract: | The use of photonic crystals (PCs) for realistic light emitting diodes (LEDs) is discussed, given the constraints of planar semiconductor technology. A viable route for the fabrication of high-efficiency high-brightness electrically injected LEDs is presented. The starting point is a top-emitting microcavity using a single Alox Bragg mirror. The active area is surrounded by two-dimensional PCs, namely arrays of air rods etched through the top layers; injection of the electrons is achieved through the crystals. Design rules for PCs as efficient out-couplers are detailed. The building blocks are assessed experimentally, and we show that promising results are at hand. |
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| Keywords: | high-efficiency light-emitting diodes photonic crystals |
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