Publication

Cathodoluminescence investigations of three-dimensional island formation in quantum wells

Jean-François Carlin, Alok Rudra
1995
Journal Articles

Abstract

When a growth interruption is applied to the top interface of a nominally 3 monolayers (ML) thick InAs quantum well (QW), grown on an InP substrate, the InAs layer relaxes by formation of three-dimensional (3D) islands. The emission from the QW is split into at least 8 peaks. Each peak corresponds to an integral number of MLs of InAs. Using cathodoluminescence imaging and photoluminescence excitation spectroscopy, we demonstrate that the emission originates in 3D islands with a lateral extension of less than 1 mu m. Furthermore, most of the 3D islands are completely isolated, separated by InP, even though there are 3D islands of different thicknesses that are connected. A conclusion from our investigation is that the whole InAs layer, rather than just the top ML, is involved in the 3D island formation.

Official source

https://infoscience.epfl.ch/entities/publication/5c7b3018-fc76-4aab-859c-66023b3d054e

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Jean-François Carlin, Alok Rudra
1995
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/5c7b3018-fc76-4aab-859c-66023b3d054e

About this result

Related concepts (32)

Indium arsenide

Indium arsenide, InAs, or indium monoarsenide, is a narrow-bandgap semiconductor composed of indium and arsenic. It has the appearance of grey cubic crystals with a melting point of 942 °C. Indium arsenide is similar in properties to gallium arsenide and is a direct bandgap material, with a bandgap of 0.35 eV at room temperature. Indium arsenide is used for the construction of infrared detectors, for the wavelength range of 1.0–3.8 μm. The detectors are usually photovoltaic photodiodes.

Indium phosphide

Indium phosphide (InP) is a binary semiconductor composed of indium and phosphorus. It has a face-centered cubic ("zincblende") crystal structure, identical to that of GaAs and most of the III-V semiconductors. Indium phosphide can be prepared from the reaction of white phosphorus and indium iodide at 400 °C., also by direct combination of the purified elements at high temperature and pressure, or by thermal decomposition of a mixture of a trialkyl indium compound and phosphine.

3D computer graphics

3D computer graphics, sometimes called CGI, 3D-CGI or three-dimensional , are graphics that use a three-dimensional representation of geometric data (often Cartesian) that is stored in the computer for the purposes of performing calculations and rendering , usually s but sometimes s. The resulting images may be stored for viewing later (possibly as an animation) or displayed in real time. 3D computer graphics, contrary to what the name suggests, are most often displayed on two-dimensional displays.

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Cathodoluminescence investigations of three-dimensional island formation in quantum wells

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