Real-time video rate imaging with a 1k-pixel THz CMOS focal plane array
Real-time video rate imaging with a 1k-pixel THz CMOS focal plane array
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DOI：
10.1117/12.919218
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发表时间：
2012-05
期刊：
影响因子：
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通讯作者：
J. Grzyb;H. Sherry;Y. Zhao;R. Al Hadi;A. Cathelin;A. Kaiser;U. Pfeiffer
中科院分区：
文献类型：
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作者：
J. Grzyb;H. Sherry;Y. Zhao;R. Al Hadi;A. Cathelin;A. Kaiser;U. Pfeiffer
未来的亚毫米波和太赫兹（300 GHz-3 THz）成像应用将需要低成本的便携式系统，在室温下运行，具有视频速率的速度，并能够在非常低的功耗水平下提供可接受的灵敏度，以成为真正的商业应用的吸引力。特别地，CMOS技术由于其以高产量提供的高集成度而受到关注，这能够大幅降低当前现有THz系统的成本。最近已经证明，CMOS直接探测器实现的性能相当，甚至上级到今天现有的经典太赫兹器件的主动成像工作在室温下。然而，到目前为止，只使用了单个像素，只允许光栅扫描操作。为了解决这一障碍，我们提出了一个1 k像素的相机芯片上的一个完全集成的读出电路和全视频速率的能力，功耗为2.5μW/像素的最初的工作。该芯片完全符合工业批量CMOS技术，适用于主动成像应用。它具有80μm的像素间距，由一种新型的片上线环天线定义，并被设计为容纳硅超半球形透镜，用于至少0.7-1.1 THz的宽工作带宽。
Future submillimeter-wave and THz (300GHz-3THz) imaging applications will require low-cost portable systems operating at room-temperature with a video-rate speed and capable of delivering acceptable sensitivity at the very low-power consumption levels to become attractive for truly commercial applications. In particular, CMOS technologies are of interest due to their high integration level offered at a high yield that is capable of massive cost reduction of currently existing THz systems. It has been recently demonstrated that CMOS direct detectors achieve the performance comparable or even superior to the today's existing classical THz devices for active imaging operating at room-temperature. So far, however, only single pixels have been used, allowing only a raster-scan operation. To address this obstacle, we present the very initial work on a 1k-pixel camera chip with a completely integrated readout circuitry and with a full video-rate capability at a power consumption of 2.5μW/pixel. The chip is fully compliant with an industrial bulk CMOS technology and it is intended for active imaging applications. It exhibits a pixel pitch of 80μm, defined by a novel on-chip wire ring antenna, and is designed to accommodate silicon hyper-hemispherical lens for a wide operation bandwidth of at least 0.7-1.1 THz.