Bulk-like transverse electron mobility in an array of heavily $n$-doped InP nanowires probed by terahertz spectroscopy

Bulk-like transverse electron mobility in an array of heavily $n$ -doped InP nanowires probed by terahertz spectroscopy

C. S. Ponseca, Jr., H. Němec, J. Wallentin, N. Anttu, J. P. Beech, A. Iqbal, M. Borgström, M.-E. Pistol, L. Samuelson, and A. Yartsev

Phys. Rev. B 90, 085405 – Published 5 August 2014

Abstract

Terahertz spectroscopy is employed for the noncontact measurement of transversal mobility in InP nanowires, wherein photonic effects (waveguiding of excitation beam and propagation of terahertz beam in a complex gradient environment) were successfully deconvoluted. Monte Carlo calculations accounting for electron localization and heavy doping were used to determine electron momentum relaxation time corresponding to electron mobility $\geq 3000 {cm}^{2} / V s$ , which is similar to that in bulk InP. The developed approach paves a way for noncontact determination of charge mobility in advanced semiconductor nanostructures.

Received 28 November 2013
Revised 18 July 2014

DOI:https://doi.org/10.1103/PhysRevB.90.085405

Authors & Affiliations

C. S. Ponseca, Jr.^1,*, H. Němec^2,*, J. Wallentin^3,†, N. Anttu³, J. P. Beech³, A. Iqbal¹, M. Borgström³, M.-E. Pistol³, L. Samuelson³, and A. Yartsev¹

¹Department of Chemical Physics, Lund University, Getingevägen 60, Box 124, 221 00 Lund, Sweden
²Institute of Physics of the Academy of Sciences of the Czech Republic, Na Slovance 2, 182 21 Praha 8, Czech Republic
³Division of Solid State Physics, Lund University, Box 118, Lund S-22100, Sweden

^*These authors contributed equally to this work: carlito.ponseca@chemphys.lu.se and nemec@fzu.cz.
^†Current address: Institute for X-ray Physics, University of Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany.

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Vol. 90, Iss. 8 — 15 August 2014

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