Publications de Henri Benisty | EPFL Graph Search

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Omnidirectional light extraction in GaN LEDs using an Archimedean tiling photonic crystal

Elison de Nazareth Matioli, Henri Benisty

We study photonic crystal (PhC)-assisted light extraction from gallium nitride (GaN) light-emitting diodes (LEDs). We focus on the issue of omnidirectional extraction, and we introduce a complex crystal lattice, namely the Archimedean tiling, which enables ...

Spie-Int Soc Optical Engineering2006

Disorder-induced losses in planar photonic crystals

Romuald Houdré, Rolando Ferrini, Henri Benisty

The phenomenological approach introduced by Benisty et al. [Appl. Phys. Lett. 76, 532 (2000)] to model out-of-plane radiation losses in planar photonic crystals with a low vertical refractive index contrast is extended to the case of in-plane disorder. The ...

2006

GaN light-emitting diodes with Archimedean lattice photonic crystals

Elison de Nazareth Matioli, Henri Benisty

We study GaN-based light emitting diodes incorporating an omnidirectional photonic crystal with Archimedean lattice. Photonic bands are observed over several Brillouin zones, revealing reciprocal space symmetries and evidencing the omnidirectionality of th ...

American Institute of Physics2006

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

Romuald Houdré, Jean-François Carlin, Ursula Oesterle, Henri Benisty

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 devic ...

2002

Waveguide photonic crystals and microstructures

Romuald Houdré, Marc Ilegems, Ursula Oesterle, Henri Benisty

Regular periodic structures with large refractive index contrast are often called photonic crystals and may exhibit photonic bandgap behaviour. Planar waveguide 2D and 1D periodic microstructures exhibiting photonic bandgap behaviour are likely to be usefu ...

1999

Directional effects in photonic bandgap cavities

Romuald Houdré, Ursula Oesterle, Henri Benisty

We present here measurements on hexagonal cavities that have areas between 2.0 and 8.6 mu m/sup 2/. The 2D triangular lattice PBG mirrors are etched into a GaAs/AlGaAs waveguide heterostructure with 3 layers of InAs quantum dots at the centre of a 240 nm t ...

1999

Henri Benisty

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