Abstract
We show both theoretically and experimentally that passive amplification of the pyroelectric current takes place when modulated radiation is recorded by a pyroelectric detector in some range of modulation frequencies. The amplification effect manifests itself in the fact that the current generated by a thin pyroelectric film lying on a massive heat-conducting substrate exceeds that in a freely suspended film. We use a ferroelectric 70:30 P(VDF-TrFE) copolymer, a crystalline guanidine pyroelectric, and a 70:30 composition of an achiral liquid-crystal polymer and its monomer PM6R14n-M6R14n to illustrate the frequency dependence of the pyroelectric current.
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Original Russian Text © S.V. Yablonskii, E.A. Soto-Bustamante, 2010, published in Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2010, Vol. 138, No. 5, pp. 921–929.
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Yablonskii, S.V., Soto-Bustamante, E.A. Passive amplification of the pyroelectric current in thin films on a heat-conducting substrate. J. Exp. Theor. Phys. 111, 814–821 (2010). https://doi.org/10.1134/S1063776110110129
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DOI: https://doi.org/10.1134/S1063776110110129