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Transient Terahertz Conductivity of GaAs Nanowires

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Date

2007

Authors

Parkinson, Patrick Wallace
Lloyd-Hughes, J
Gao, Qiang
Jagadish, Chennupati
Johnston, Michael B
Herz, Laura
Tan, Hark Hoe

Journal Title

Journal ISSN

Volume Title

Publisher

American Chemical Society

Abstract

The time-resolved conductivity of isolated GaAs nanowires is investigated by optical-pump terahertz-probe time-domain spectroscopy. The electronic response exhibits a pronounced surface plasmon mode that forms within 300 fs before decaying within 10 ps as a result of charge trapping at the nanowire surface. The mobility is extracted using the Drude model for a plasmon and found to be remarkably high, being roughly one-third of that typical for bulk GaAs at room temperature.

Description

Keywords

Keywords: Electric charge; Mathematical models; Semiconducting gallium arsenide; Thermal effects; Drude model; Nanowire surface; Time-domain spectroscopy; Nanowires

Citation

URI

http://hdl.handle.net/1885/21808

Collections

ANU Research Publications

Source

Nano Letters

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1021/nl071162x

Restricted until

2037-12-31

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01_Parkinson_Transient_Terahertz_2007.pdf (245.14 KB)

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