Response of edge- and face-electroded pyroelectric detectors to infrared laser signals
- 1 February 1973
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 22 (3) , 99-100
- https://doi.org/10.1063/1.1654578
Abstract
Expressions are given for the peak voltage responses to infrared laser signals in pyroelectric detectors with edge electrodes (EE) and face electrodes (FE). When the response is independent of the capacitance Cs of the samples, the FE detector has a much higher responsivity. When the response depends on Cs and the capacitance Ci of the preamplifier input is negligible for both samples, the EE design can give only a slightly higher response (the high gain expected in the literature comes from considering the EE sample as a parallel‐plate condenser). However, when CsEE << Ci << CsFE, the EE detector response is higher by a factor of εl/Ci, where ε is the permittivity and l is the length of the edge electrodes.Keywords
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