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- W2017240987 abstract "In recent years our group has made significant progress toward the goal of a scalable, inexpensive terahertz imaging system for the detection of weapons concealed under clothing. By actively illuminating the subject under examination with only moderate source power (few milliwatts) the sensitivity constraints on the detector technology are significantly lessened compared to purely passive millimeter-wave detection. Last year, we demonstrated a fully planar, optically lithographed, uncooled terahertz imaging array with 120 pixels on a silicon substrate 75 mm in diameter. In this paper we present the recent progress on improving the responsivity of the individual microbolometers by a simple technique of surface micromachining to reduce the substrate thermal conduction. We describe the microbolometer array fabrication and present results on devices with a measured electrical responsivity of over 85 V/W (electrical NEP ~25 pW/rtHz), an improvement by a factor of two over current substrate-supported bolometers." @default.
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- W2017240987 date "2004-09-08" @default.
- W2017240987 modified "2023-09-27" @default.
- W2017240987 title "Micromachined antenna-coupled uncooled microbolometers for terahertz imaging arrays" @default.
- W2017240987 doi "https://doi.org/10.1117/12.543236" @default.
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