Publication

Toward ultrahigh-efficiency aluminum oxide microcavity light- emitting diodes: Guided mode extraction by photonic crystals

Romuald Houdré, Jean-François Carlin, Ursula Oesterle
2002
Journal Articles

Abstract

In this paper, we present an improved version of microcavity light-emitting diodes, relying on the use of a low-index material, aluminum oxide. Our work addresses in particular the injection scheme required by the insulating nature of this oxide. The device we fabricated demonstrated efficiencies up to 28% in air, using only planar technology. In these structures, most of the emission is guided. We further propose to include photonic crystals to extract this guided light. The design of the photonic crystals are discussed and substantiated by photoluminescence-based experiments.

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https://infoscience.epfl.ch/entities/publication/4ed0ffa4-4b18-41f9-ac23-c16ae7f59e3c

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Romuald Houdré, Jean-François Carlin, Ursula Oesterle
2002
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/4ed0ffa4-4b18-41f9-ac23-c16ae7f59e3c

About this result

Related concepts (22)

Photonic crystal

A photonic crystal is an optical nanostructure in which the refractive index changes periodically. This affects the propagation of light in the same way that the structure of natural crystals gives rise to X-ray diffraction and that the atomic lattices (crystal structure) of semiconductors affect their conductivity of electrons. Photonic crystals occur in nature in the form of structural coloration and animal reflectors, and, as artificially produced, promise to be useful in a range of applications.

Photonics

Photonics is a branch of optics that involves the application of generation, detection, and manipulation of light in form of photons through emission, transmission, modulation, signal processing, switching, amplification, and sensing. Photonics is closely related to quantum electronics, where quantum electronics deals with the theoretical part of it while photonics deal with its engineering applications. Though covering all light's technical applications over the whole spectrum, most photonic applications are in the range of visible and near-infrared light.

Photonic integrated circuit

A photonic integrated circuit (PIC) or integrated optical circuit is a microchip containing two or more photonic components which form a functioning circuit. This technology detects, generates, transports, and processes light. Photonic integrated circuits utilize photons (or particles of light) as opposed to electrons that are utilized by electronic integrated circuits. The major difference between the two is that a photonic integrated circuit provides functions for information signals imposed on optical wavelengths typically in the visible spectrum or near infrared (850–1650 nm).

Related publications (14)

Toward ultrahigh-efficiency aluminum oxide microcavity light- emitting diodes: Guided mode extraction by photonic crystals

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