基于微纳机械加工的THz单光子探测器及其应用

The Single Photon Photodetector Model at THz and Its Application

通过量子阱的子带跃迁光吸收改变自身带电状态来调控另一个量子阱中的二维电子横向输运特性,从而产生可探测的电导变化。这种双量子阱电容耦合的结构具有很高的非线性放大系数,从而具有很高的探测效率,响应波长可以从远红外设计至THz波段。针对器件特性设计增益可调读出电路,进一步研制成工业级微型光谱仪。

Charge-sensitive infrared photodetector（CSIP） utilizes a double-quantum well（DQW） structure,including an upper quantum well for photo-electron excitation and a lower one for lateral transport of electrons.It has capable of sensing incident radiation with higher sensitivity in far IR wavelength range,showing great potential as single-photon detector in the terahertz and far infrared range.Using capacitive transimpedance amplifiers（CTIA） readout circuit for the CSIP,it can be make a miniature spectrograph for more application,