A far-infrared Fourier transform spectrometer with an antenna-coupled niobium bolometer
A far-infrared Fourier transform spectrometer with an antenna-coupled niobium bolometer
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DOI：
10.1088/0953-2048/20/11/s19
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发表时间：
2007-10
影响因子：
3.6
通讯作者：
D. Santavicca;A. Annunziata;M. Reese;L. Frunzio;D. Prober
中科院分区：
文献类型：
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作者：
D. Santavicca;A. Annunziata;M. Reese;L. Frunzio;D. Prober
我们已经设计并建造了一个定制的远红外傅里叶变换光谱仪使用天线耦合测辐射热计作为探测器。探测器的有源元件是超导铌微桥，远红外信号通过安装在超半球硅透镜上的平面天线耦合到微桥。光谱仪使用具有与频率无关的光学组件的宽带黑体源，因此系统带宽由检测器天线设置。我们已经制造了两种不同的天线类型，双偶极子和对数螺旋的设备，并具有各自的光谱响应的特点。该光谱仪可以利用铌测辐射热计的快速响应，在纳秒到毫秒的时间尺度上进行时间分辨远红外光谱。这些时间尺度对于标准商业测辐射热计来说太快，而对于典型的光学延迟线来说太长。
We have designed and constructed a custom far-infrared Fourier transform spectrometer using an antenna-coupled bolometer as a detector. The active element of the detector is a superconducting niobium microbridge, and the far-infrared signal is coupled to the microbridge via a planar antenna mounted on a hyperhemispherical silicon lens. The spectrometer uses a broadband blackbody source with frequency-independent optical components, and thus the system bandwidth is set by the detector antenna. We have fabricated devices with two different antenna types, the double dipole and the log spiral, and have characterized the spectral response of each. This spectrometer can utilize the fast response of the niobium bolometer to perform time-resolved far-infrared spectroscopy on nanosecond to millisecond timescales. These timescales are too fast for standard commercial bolometers and too long for a typical optical delay line.