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Creators/Authors contains: "Brady, Jacob"

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  1. ; ; ; (, Applied Physics Letters)
    Mid-infrared photodetectors that can operate at room temperature are of great interest for a wide range of applications. Here, we demonstrate unbiased, mid-infrared (10.4 μm) photodetection in epitaxial thin films of the three-dimensional Dirac semimetal cadmium arsenide (Cd3As2), which are grown on a III–V heterostructure. We show that the photocurrent response of planar metal–Cd3As2–metal devices is consistent with the photothermoelectric effect, which is due to a temperature gradient that develops under asymmetric illumination of the device. We show that the photoresponsivity of Cd3As2 channel devices is an order of magnitude greater than devices with a III–V semiconductor channel, attesting to the excellent thermoelectric properties of Cd3As2 and promising efficient unbiased, room-temperature mid-infrared photodetection. 
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    Free, publicly-accessible full text available May 5, 2026