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Transient terahertz conductivity of GaAs nanowires

被引：182
作者：
Parkinson, Patrick
Lloyd-Hughes, James
Gao, Qiang
Tan, H. Hoe
Jagadish, Chennupati
Johnston, Michael B.
Herz, Laura M.
机构：
[1] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England
[2] Australian Natl Univ, Inst Adv Studies, Res Sch Phys Sci & Engn, Dept Elect Mat Engn, Canberra, ACT 0200, Australia
来源：
NANO LETTERS | 2007年 / 7卷 / 07期
基金：
英国工程与自然科学研究理事会;
关键词：
D O I：
10.1021/nl071162x
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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.
引用
收藏
页码：2162 / 2165
页数：4
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