FAR-INFRARED PHOTON-INDUCED CURRENT IN A QUANTUM POINT-CONTACT

被引：65

作者：

WYSS, RA ^{[1
]}

EUGSTER, CC ^{[1
]}

DELALAMO, JA ^{[1
]}

HU, Q ^{[1
]}

机构：

[1] MIT,ELECTR RES LAB,CAMBRIDGE,MA 02139

来源：

APPLIED PHYSICS LETTERS | 1993年 / 63卷 / 11期

关键词：

D O I：

10.1063/1.110736

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Motivated by the recently developed theory of photon-assisted quantum transport, we have studied transport properties of an antenna-coupled quantum point contract under coherent far-infrared (285 GHz) radiation. A pronounced photon-induced drain/source current is observed. The amplitude of the photon-induced current is about 10% of that corresponding to a quantized conductance step, and it oscillates with the gate voltage. Our analysis suggests that the observed photon-induced current is mainly due to heating of the electron gas in the source and drain (a bolometric effect) rather than photon-assisted quantum transport. Future improvement of the device parameters to enhance the effect of photon-assisted transport will be discussed.

引用

页码：1522 / 1524

页数：3

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