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本文实现了一款0.42THz、9.2dBm的64像素源阵列SoC，采用空间调制多样性技术用于计算太赫兹成像。该芯片通过集成多像素源阵列和计算成像算法克服了传统太赫兹成像系统的信噪比限制，并实现了快速成像。
Computational THz Imaging (CTI) is the process of indirectly forming images using algorithms that rely on a significant amount of computing. Unlike focalplane arrays (FPAs), a single-pixel camera (SPC) uses spatially patterned illumination in conjunction with CTI to measure the entire image using only one receiver [1]. CTI can overcome existing SNR limitations in THz imaging systems as it relaxes the implementation issues of high-power sources and low-noise FPAs (Fig. 29.1.1). However, measurements must be taken in series rather than all at once, which calls for fast THz system-on-a-chip (SoC) implementations in advanced silicon technologies. Past work on THz SPCs have relied on external metamaterial [1] or plasmonic [2] switches for spatial modulation, but their low modulation depth (< 60%) and rate (<20kHz) degrade the imaging speed and SNR. Silicon-based source arrays have shown coherent/incoherent power combining for coherent imaging [3], beamsteering [4], and diffused-illumination
Ritesh Jain, Philipp Hillger, Janusz Grzyb, Ullrich R. Pfeiffer
University of Wuppertal, Wuppertal, Germany