Complementary domain pyroelectric detectors with reduced sensitivity to mechanical vibrations and temperature changes

Abstract

LiTaO₃ pyroelectric detectors have been fabricated in a novel complementary domain configuration that reduces the interference from vibrational noise sources and from changes in ambient temperature by over an order of magnitude relative to the performance of conventional pyroelectric detectors. Detectors made in this complementary domain configuration exhibit D’s in excess of 10⁹ cm Hz^1/2 W⁻¹, and the measured D’s degrade less than 10% in the presence of accelerations as great as 0.05g in a 1‐Hz bandwidth, or temperature changes of 10 °C/min.