Dependence of Infrared Photoresponse of Pyroelectric Thin Film Detector with Respect to Chopper Frequency

Abstract

In this paper, the dependence of infrared photoresponse of a pyroelectric thin film detector with respect to chopper frequency is studied theoretically and experimentally. The expressions of photocurrent, photovoltage and a special chopper frequency f m at which the maximum photovoltage is generated, are derived. A PMSZT/YBCO heterostructure is taken as the pyroelectric infrared detector and its photocurrent and photovoltage dependence on chopper frequency was measured. The experimental results are satisfactory and in agreement with theoretical analysis.