EFFECT OF TERAHERTZ IRRADIATION ON BALLISTIC TRANSPORT THROUGH ONE-DIMENSIONAL QUANTUM POINT CONTACTS

被引：19

作者：

ARNONE, DD ^{[1
]}

FROST, JEF ^{[1
]}

SMITH, CG ^{[1
]}

RITCHIE, DA ^{[1
]}

JONES, GAC ^{[1
]}

BUTCHER, RJ ^{[1
]}

PEPPER, M ^{[1
]}

机构：

[1] UNIV CAMBRIDGE,CAVENDISH LAB,CAMBRIDGE CB3 0HE,ENGLAND

来源：

APPLIED PHYSICS LETTERS | 1995年 / 66卷 / 23期

关键词：

D O I：

10.1063/1.113705

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A one-dimensional ballistic constriction has been fabricated from a two-dimensional electron gas formed at the interface of a GaAs/AlGaAs heterostructure. The constriction was induced via a pair of front gates which also served as a broadband far-infrared (FIR) antenna. The photocurrent through the constriction was recorded as a function of source-drain bias at various FIR frequencies, one-dimensional subband spacings, and for orthogonal FIR polarizations. The photocurrent was compared to the derivative of dc conductance with respect to source-drain bias. While dc rectification is shown to dominate the photocurrent, deviations from this model occur at frequencies above ∼1 THz, yielding an estimate of the upper limit of the electron scattering time in the constriction region.© 1995 American Institute of Physics.

引用

页码：3149 / 3151

页数：3

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