Quantum-confinement effects in InAs-InP core-shell nanowires

[en] We report the detection of quantum confinement in single InAs–InP core–shell nanowires. The wires, having an InAs core with ~25 nm diameter, are characterized by emission spectra in which two peaks are identified under high excitation intensity conditions. The peaks are caused by emission from the ground and excited quantized levels, due to quantum confinement in the plane perpendicular to the nanowire axis. We have identified different energy contributions in the emission spectra, related to the wurtzite structure of the wires, the strain between the wurtzite core and the shell, and the confinement energy of the InAs core. Calculations based on six-band strain-dependent theory allow the theoretical estimation of the confined energy states in such materials, and we found these results to be in good agreement with those from the photoluminescence studies.

Disciplines :

Physics

Author, co-author :

Zanolli, Zeila ; Lund University > Solid State Physics

Pistol, Mats-Eric

Froberg, Linus E

Samuelson, Lars

Language :

English

Title :

Quantum-confinement effects in InAs-InP core-shell nanowires

Publication date :

2007

Journal title :

Journal of Physics: Condensed Matter

ISSN :

0953-8984

eISSN :

1361-648X

Publisher :

Institute of Physics, Bristol, United Kingdom

Volume :

Issue :

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://iopscience.iop.org/0953-8984/19/29/295219

Available on ORBi :

since 28 October 2011

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