Publication

Near-infrared characterization of gallium nitride photonic-crystal waveguides and cavities

Nicolas Grandjean, Romuald Houdré, Jean-François Carlin, Noelia Vico Triviño, Ulagalandha Perumal Dharanipathy, Zhaolu Diao
2012
Journal Articles

Abstract

We report the design and optical characterization of fully suspended wire waveguides and photonic crystal (PhC) membranes fabricated on a gallium nitride layer grown on silicon substrate operating at 1.5 mu m. W1-type PhC waveguides are coupled with suspended wires and are investigated using a standard end-fire setup. The experimental and theoretical dispersion properties of the propagating modes in the wires and photonic-crystal waveguides are shown. Modified L3 cavities with quality factors of up to 2200 and heterostructure cavities with quality factors of up to 5400 are experimentally demonstrated. (C) 2012 Optical Society of America

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https://infoscience.epfl.ch/entities/publication/926fb1d2-5419-497b-b7af-96e3f5a3de11

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Nicolas Grandjean, Romuald Houdré, Jean-François Carlin, Noelia Vico Triviño, Ulagalandha Perumal Dharanipathy, Zhaolu Diao
2012
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/926fb1d2-5419-497b-b7af-96e3f5a3de11

About this result

Related concepts (24)

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).

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.

Gallium nitride

Gallium nitride () is a binary III/V direct bandgap semiconductor commonly used in blue light-emitting diodes since the 1990s. The compound is a very hard material that has a Wurtzite crystal structure. Its wide band gap of 3.4 eV affords it special properties for applications in optoelectronic, high-power and high-frequency devices. For example, GaN is the substrate which makes violet (405 nm) laser diodes possible, without requiring nonlinear optical frequency-doubling.

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