Frequency-selective single-photon detection using a double quantum dot
Frequency-selective single-photon detection using a double quantum dot
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DOI：
10.1103/physrevlett.99.206804
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发表时间：
2007-11-16
影响因子：
8.6
通讯作者：
Gossard, A. C.
中科院分区：
文献类型：
--
作者：
Gustavsson, S.;Studer, M.;Gossard, A. C.
利用双量子点作为频率可调谐的片上微波探测器，研究了近场量子点接触中电子散粒噪声的辐射特性。该装置是通过监测由于光子吸收的量子点之间的电子的非弹性隧穿来实现的。吸收辐射的频率由点之间的能量分离设定，可以很容易地通过栅极电压进行调整。利用时间分辨电荷探测技术，我们可以直接将探测到的隧穿电子与单个光子的吸收联系起来。
We use a double quantum dot as a frequency-tunable on-chip microwave detector to investigate the radiation from electron shot-noise in a near-by quantum point contact. The device is realized by monitoring the inelastic tunneling of electrons between the quantum dots due to photon absorption. The frequency of the absorbed radiation is set by the energy separation between the dots, which is easily tuned with gate voltages. Using time-resolved charge-detection techniques, we can directly relate the detection of a tunneling electron to the absorption of a single photon.