IndiumV3, Chine, Analysis, bibRecord, 000603

Colorful InAs Nanowire Arrays: From Strong to Weak Absorption with Geometrical Tuning

Identifieur interne : 000603 ( Chine/Analysis ); précédent : 000602; suivant : 000604

Colorful InAs Nanowire Arrays: From Strong to Weak Absorption with Geometrical Tuning

Auteurs : RBID : Pascal:12-0193325

Descripteurs français

Pascal (Inist)
- Arséniure d'indium, Semiconducteur III-V, Composé III-V, Nanofil, Nanomatériau, Réseau(arrangement), Structure 1 dimension, Absorption lumière, Couche mince, Modèle milieu effectif, Dispositif photovoltaïque, InAs, 8107V, 8107B, 8535, 8565.

English descriptors

KwdEn :
- Arrays, Effective medium model, III-V compound, III-V semiconductors, Indium arsenides, Light absorption, Nanostructured materials, Nanowires, One dimensional structure, Photovoltaic cell, Thin films.

Abstract

One-dimensional nanostructure arrays can show fascinatingly different, tunable optical response compared to bulk systems. Here we study theoretically and demonstrate experimentally how to engineer the reflection and absorption of light in epitaxially grown vertical arrays of InAs nanowires (NWs). A striking observation is optically visible colors of the array, which we show can be tuned depending on the geometrical parameters of the array. Specifically, larger diameter NW arrays absorb light more effectively out to a longer wavelength compared to smaller diameter arrays. Thus, controlling the diameter provides a way to tune the optically observable color of an array. We also find that arrays with a larger amount of InAs material reflect less light (or absorb more light) than arrays with less material. On the basis of these two trends, InAs NW arrays can be designed to absorb light either much more or much less efficiently than a thin film of an effective medium containing the same amount of InAs as the NW array. The tunable absorption and low area filling factor of the NW arrays compared to thin film bode well for III-V photovoltaics and photodetection.

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Pascal:12-0193325

Le document en format XML

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<author><name sortKey="Wu, Phillip M" uniqKey="Wu P">Phillip M. Wu</name>
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<author><name sortKey="Anttu, Nicklas" uniqKey="Anttu N">Nicklas Anttu</name>
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<author><name sortKey="Xu, H Q" uniqKey="Xu H">H. Q. Xu</name>
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<author><name sortKey="Samuelson, Lars" uniqKey="Samuelson L">Lars Samuelson</name>
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<author><name sortKey="Pistol, Mats Erik" uniqKey="Pistol M">Mats-Erik Pistol</name>
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<front><div type="abstract" xml:lang="en">One-dimensional nanostructure arrays can show fascinatingly different, tunable optical response compared to bulk systems. Here we study theoretically and demonstrate experimentally how to engineer the reflection and absorption of light in epitaxially grown vertical arrays of InAs nanowires (NWs). A striking observation is optically visible colors of the array, which we show can be tuned depending on the geometrical parameters of the array. Specifically, larger diameter NW arrays absorb light more effectively out to a longer wavelength compared to smaller diameter arrays. Thus, controlling the diameter provides a way to tune the optically observable color of an array. We also find that arrays with a larger amount of InAs material reflect less light (or absorb more light) than arrays with less material. On the basis of these two trends, InAs NW arrays can be designed to absorb light either much more or much less efficiently than a thin film of an effective medium containing the same amount of InAs as the NW array. The tunable absorption and low area filling factor of the NW arrays compared to thin film bode well for III-V photovoltaics and photodetection.</div>
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   |clé=     Pascal:12-0193325
   |texte=   Colorful InAs Nanowire Arrays: From Strong to Weak Absorption with Geometrical Tuning
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Colorful InAs Nanowire Arrays: From Strong to Weak Absorption with Geometrical Tuning

Colorful InAs Nanowire Arrays: From Strong to Weak Absorption with Geometrical Tuning

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri