Photon counting detectors for the far infrared

被引：0

作者：

Astafiev, O ^{[1
]}

Antonov, V ^{[1
]}

Kutsuwa, T ^{[1
]}

Komiyama, S ^{[1
]}

机构：

[1] Univ Tokyo, Dept Basic Sci, Tokyo, Japan

来源：

LOW TEMPERATURE DETECTORS | 2002年 / 605卷

关键词：

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Single-electron transistor (SET) operation of a quantum dot (QD), fabricated in a GaAs/AlxGa1-xAs heterostructure crystal is demonstrated to serve as an extremely high sensitivity detector of far-infrared (FIR). When the single QD is placed in a high magnetic field, the resonant conductance through the SET switches on (off) upon the excitation of just one electron to a higher Landau level inside the QD, thereby enabling us to detect individual events of FIR-photon absorption (lambda = 0.17 - 0.22 mm). Additionally, we demonstrate that the SET consisting of two parallel QDs operates as a high sensitivity detector of FIR approaching the single-photon counting level in the absence of magnetic fields.

引用

页码：275 / 280

页数：6

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