论文标题
使用贴片 - 安特纳量子级联检测器
Long-wavelength infrared photovoltaic heterodyne receivers using patch-antenna quantum cascade detectors
论文作者
论文摘要
量子级联检测器（QCD）是单极红外设备，在没有施加偏见的情况下，照片激发载体的传输通过密封的电子状态进行。在这种光伏模式下，检测器的噪声不受暗射击噪声过程的主导，因此，相对于光导通探测器，在高温下，性能降低了。这项工作描述了一个9 UM QCD，该QCD嵌入了斑块 - 安特纳纳材料中，该材料具有最先进的性能。超材料会在收集区域收集光子，Acoll，比检测器的几何区域大得多，将信号与噪声比提高到室温。在83 K处的背景受限的探测率为5.5 x 10^10 cm Hz^1/2 w^-1，而在室温下，响应性为0 V偏置的50 mA/w。贴片天线QCD是杂作检测设置的理想接收器，其中频率为1.4 GHz和t = 295 K的信号首次证明了带有GHz电带宽的未冷却9UM光伏接收器。这些发现指导该研究对未冷却的IR量子有限检测。
Quantum cascade detectors (QCD) are unipolar infrared devices where the transport of the photo excited carriers takes place through confined electronic states, without an applied bias. In this photovoltaic mode, the detector's noise is not dominated by a dark shot noise process, therefore, performances are less degraded at high temperature with respect to photoconductive detectors. This work describes a 9 um QCD embedded into a patch-antenna metamaterial which operates with state-of-the-art performances. The metamaterial gathers photons on a collection area, Acoll, much bigger than the geometrical area of the detector, improving the signal to noise ratio up to room temperature. The background-limited detectivity at 83 K is 5.5 x 10^10 cm Hz^1/2 W^-1, while at room temperature, the responsivity is 50 mA/W at 0 V bias. Patch antenna QCD is an ideal receiver for a heterodyne detection set-up, where a signal at a frequency 1.4 GHz and T=295 K is reported as first demonstration of uncooled 9um photovoltaic receivers with GHz electrical bandwidth. These findings guide the research towards uncooled IR quantum limited detection.
