Abstract
A distributed electrode structure of sensitive element based on Mn-doped Pb(Mg1/3Nb2/3)O3-0.29PbTiO3 single crystals for high-end pyroelectric infrared detectors has been proposed, demonstrating a notably superior pyroelectric response. Under the optimal electrode distance of 0.5mm, the figure of merit for detectivity is up to 39.9×10−5Pa−1/2. An ultrahigh responsivity of 864V/W and specific detectivity of 1.49×109cmHz1/2/W at 10Hz are observed, approximately 3.6 and 1.4 times higher, respectively, than that of the conventional faced electrode structure. The enhanced responsivity and specific detectivity of the distributed electrode structure will make PMNT based detectors with voltage mode promising in practical use of sensors.
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