THz Emission from PZT Nanotubes

被引：3

作者：

Banys, J. ^{[1
]}

Ivanov, M. ^{[1
]}

Macutkevic, J. ^{[2
]}

Krotkus, A. ^{[2
]}

Fan, H. J. ^{[3
]}

Kawasaki, S. ^{[3
]}

Scott, J. F. ^{[3
]}

机构：

[1] Vilnius State Univ, Fac Phys, LT-10222 Vilnius, Lithuania

[2] Inst Semicond Phys, LT-01108 Vilnius, Lithuania

[3] Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England

来源：

FERROELECTRICS | 2009年 / 378卷

关键词：

PZT; nanotubes; THz generation; SEMICONDUCTOR SURFACES; TERAHERTZ RADIATION; LASER-PULSES; GENERATION;

D O I：

10.1080/00150190902845152

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report THz emission from lead zirconate-titanate (PZT) nanotube arrays, which is totally absent in flat films or bulk PZT; hence the effect is due to the nano-scale geometry of the tubes, which are 1 m in total diameter, 40 nm in wall thickness and standing normal to the Si substrates. The THz radiation is emitted within 0.2 ps and the spectrum exhibits a broad peak from 2 to 8 THz due to the abnormally large carrier concentration gradient and large piezoelectric coefficient in PZT; the inferred mechanism is optical rectification within a surface accumulation layer, rather than the Dember effect.

引用

页码：79 / 83

页数：5

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