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CMOS detector arrays in a virtual 10-kilopixel camera for coherent terahertz real-time imaging

机译:虚拟10千像素相机中的CMOS检测器阵列,用于相干太赫兹实时成像

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We demonstrate the principle applicability of antenna-coupled complementary metal oxide semiconductor (CMOS) field-effect transistor arrays as cameras for real-time coherent imaging at 591.4 GHz. By scanning a few detectors across the image plane, we synthesize a focal-plane array of 100 X 100 pixels with an active area of 20 X 20 mm~(2), which is applied to imaging in transmission and reflection geometries. Individual detector pixels exhibit a voltage conversion loss of 24 dB and a noise figure of 41 dB for 16 (mu)W of the local oscillator (LO) drive. For object illumination, we use a radio-frequency (RF) source with 432 (mu)W at 590 GHz. Coherent detection is realized by quasioptical superposition of the image and the LO beam with 247 (mu)W. At an effective frame rate of 17 Hz, we achieve a maximum dynamic range of 30 dB in the center of the image and more than 20 dB within a disk of 18 mm diameter. The system has been used for surface reconstruction resolving a height difference in the (mu)m range.
机译:我们演示了原理上的天线耦合互补金属氧化物半导体(CMOS)场效应晶体管阵列作为相机在591.4 GHz时进行实时相干成像的原理。通过在图像平面上扫描几个检测器,我们合成了一个100 X 100像素的焦平面阵列,其有效面积为20 X 20 mm〜(2),可应用于透射和反射几何中的成像。对于本地振荡器(LO)驱动器的16μW,单个检测器像素的电压转换损耗为24 dB,噪声系数为41 dB。对于物体照明,我们在590 GHz频率下使用432μW的射频(RF)源。相干检测是通过图像和247μW的LO光束的准光学叠加实现的。在17 Hz的有效帧频下,我们在图像中心实现了30 dB的最大动态范围,在直径18 mm的光盘中实现了超过20 dB的最大动态范围。该系统已经用于表面重建,以解决μm范围内的高度差。

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