Capacitively coupled hot-electron nanobolometer as far-infrared photon counter
Capacitively coupled hot-electron nanobolometer as far-infrared photon counter
复制标题
电容耦合热电子纳米测辐射热计作为远红外光子计数器
DOI：
10.1063/1.1536728
复制
发表时间：
2002
影响因子：
4
通讯作者：
L. Kuzmin
中科院分区：
文献类型：
--
作者：
D. Anghel;L. Kuzmin
我们从理论上表明，热电子纳米测辐射计组成的一小块正常的金属，电容耦合到超导天线通过一对正常的金属绝缘体超导体（NIS）隧道结可以用作远红外光子计数器。为了使设备在高计数率最有效，我们建议使用的测辐射热计在最简单的配置，当NIS隧道结被用作电子冷却器和温度计。光子在正常金属中的吸收在电子温度中产生脉冲，其由NIS结测量。计数器可以分辨高达0.3-0.4 mm波长的光子，并且具有约20 ns的典型再平衡时间常数。
We show theoretically that hot-electron nanobolometers consisting of a small piece of normal metal, capacitively coupled to a superconducting antenna through a pair of normal metal–insulator–superconductor (NIS) tunnel junctions may be used as far-infrared photon counters. To make the device most effective at high counting rates, we suggest the use of the bolometer in the simplest configuration, when the NIS tunnel junctions are used as both an electron cooler and thermometer. The absorbtion of the photon in the normal metal produces a pulse in the electron temperature, which is measured by the NIS junctions. The counter may resolve photons up to 0.3–0.4 mm wavelength and has a typical re-equilibration time constant of about 20 ns.