Terahertz single-photon detectors based on quantum wells
Terahertz single-photon detectors based on quantum wells
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DOI：
10.1063/1.4795517
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发表时间：
2013-04-07
影响因子：
3.2
通讯作者：
Komiyama, Susumu
中科院分区：
文献类型：
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作者：
Kajihara, Yusuke;Nakajima, Takashi;Komiyama, Susumu
介绍了一种基于量子阱的半导体电荷灵敏红外光电晶体管。它们是目前唯一能够计数太赫兹地区单光子的探测器。在噪声等效功率(NEP)方面，探测器的实验值为7×10(-20)W/Hz(1/2)，而理论预期值甚至更低。这些NEP值比任何其他最先进的高灵敏度探测器都低几个数量级。除了突出的灵敏度外，该探测器还具有大电流响应率(>；1 x 10(5)A/W)和低输出阻抗(
Semiconductor charge-sensitive infrared phototransistors (CSIPs) based on quantum wells are described. They are the only detectors that are able to count single photons in the terahertz region at present. In terms of the noise equivalent power (NEP), the detectors show experimental values of 7 x 10(-20) W/Hz(1/2), while theoretically expected values are even much lower. These NEP values are by several orders of magnitude lower than any other state-of-the-art highly sensitive detectors. In addition to the outstanding sensitivity, the detectors are featured by strong advantage of huge current responsivity (>1 x 10(5) A/W) and low output impedance (