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Slot spiral detector array for broadband THz imaging1

Medical imaging applications of THz signals typically employ a mechanical raster scan using a single detector to acquire two-dimensional images of excised tissues [1] [2]. This approach involves mechanical parts and the generation of a simple THz image can take tens of minutes. Such a long acquisition and processing time is a major bottleneck in the widespread utilization of THz imaging in the medical arena as well as for various military and civilian applications. Nonetheless, the promise of THz signals (200GHz-1THz) for ex-vivo imaging and identification, particularly of malignant tissues, appears to be a viable and promising tool due to the high contrasts and resolutions achievable by the sub-millimeter wavelengths.