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
收藏
页码：1522 / 1524
页数：3
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