Abstract
Carbon nanotube (CNT) films, easily drawn from super-aligned CNT arrays with a largearea and a good compatibility with semiconductor technology, have been used as lightsensitive materials for infrared (IR) detection. A bolometric CNT detector madefrom one layer of super-aligned CNT film shows a 15.4% resistance change under10 mW mm − 2 of IR illumination and a fast characteristic response time of 4.4 ms due to its ultra-smallheat capacity per unit area in vacuum at room temperature. Besides the power intensitydetection, the anisotropic property of the super-aligned CNT films makes them idealmaterials to detect the polarization of IR light simultaneously, which provides greatpotential in infrared imaging polarimetry. Theoretical analyses have been carried out toinvestigate the influences of CNT film properties on the responsivity and response time ofthe detector.
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