Publication

One-Step Growth of Buried Heterostructures by Chemical Beam Epitaxy over Patterned InP Substrates

Alok Rudra, Marc Ilegems, Jean-Daniel Ganière
1994
Journal Articles

Abstract

We studied the formation of buried heterostructures obtained in a single growth step over nonplanar substrates patterned with ridges. When the ridge dimensions are large enough, the growth on the mesa top is similar to that on a planar substrate. In contrast, ridge spacings below almost-equal-to 10 mum influence the composition of the alloys grown on the ridge as well as those grown in the valley centre. The possible surface mechanisms which may explain this behaviour are discussed.

Official source

https://infoscience.epfl.ch/entities/publication/b4ed1807-f5f0-4895-a87c-1a3c3b243a69

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Alok Rudra, Marc Ilegems, Jean-Daniel Ganière
1994
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/b4ed1807-f5f0-4895-a87c-1a3c3b243a69

About this result

Related concepts (32)

Molecular-beam epitaxy

Molecular-beam epitaxy (MBE) is an epitaxy method for thin-film deposition of single crystals. MBE is widely used in the manufacture of semiconductor devices, including transistors, and it is considered one of the fundamental tools for the development of nanotechnologies. MBE is used to fabricate diodes and MOSFETs (MOS field-effect transistors) at microwave frequencies, and to manufacture the lasers used to read optical discs (such as CDs and DVDs). Original ideas of MBE process were first established by K.

Epitaxy

Epitaxy (prefix epi- means "on top of”) refers to a type of crystal growth or material deposition in which new crystalline layers are formed with one or more well-defined orientations with respect to the crystalline seed layer. The deposited crystalline film is called an epitaxial film or epitaxial layer. The relative orientation(s) of the epitaxial layer to the seed layer is defined in terms of the orientation of the crystal lattice of each material.

Quantum dot

Quantum dots (QDs) – also called semiconductor nanocrystals, are semiconductor particles a few nanometres in size, having optical and electronic properties that differ from those of larger particles as a result of quantum mechanics. They are a central topic in nanotechnology and materials science. When the quantum dots are illuminated by UV light, an electron in the quantum dot can be excited to a state of higher energy. In the case of a semiconducting quantum dot, this process corresponds to the transition of an electron from the valence band to the conductance band.

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One-Step Growth of Buried Heterostructures by Chemical Beam Epitaxy over Patterned InP Substrates

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