Dynamic response analysis of pyroelectric sensitive element for thermal imaging

Temperature distributions under periodic thermal excitations and the responsivity of a pyroelectric device consisting of a cover layer, infrared absorber, metal contact, sensitive pyroelectric element, interconnecting column, and bulk silicon are found. Some results of numerical thermal modeling and...

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Bibliographic Details
Published in:IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 2003-04, Vol.50 (4), p.461-465
Main Authors: Yung Sup Yoon, Samoilov, V.B., Kletsky, S.V.
Format: Article
Language:English
Subjects:
Columns (structural)
Computer Simulation
Computer-Aided Design
Constraining
Crystallization - instrumentation
Crystallization - methods
Devices
Electric potential
Equipment Design - methods
Equipment Failure Analysis - methods
Exact sciences and technology
Frequency modulation
Frequency response
Image analysis
Infrared Rays
Infrared, submillimeter wave, microwave and radiowave instruments, equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Intermediate frequencies
Mathematical models
Models, Theoretical
Numerical models
Numerical simulation
Optical imaging
Photochemistry - instrumentation
Photochemistry - methods
Physics
Pyroelectric devices
Pyroelectricity
Sensitivity and Specificity
Silicon
Temperature distribution
Thermal imaging
Thermography - instrumentation
Thermography - methods
Transducers
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Description
Summary:Temperature distributions under periodic thermal excitations and the responsivity of a pyroelectric device consisting of a cover layer, infrared absorber, metal contact, sensitive pyroelectric element, interconnecting column, and bulk silicon are found. Some results of numerical thermal modeling and analysis of exact expressions for a few extreme cases are presented. Pyroelectric responses of real structures are compared with the response of a single pyroelectric element in air as a limiting case of maximum sensitivity. The analytical approximations and numerical simulation show that the frequency response of the multilayered structure consists of different parts with simple frequency dependencies. In the region of high frequencies of light modulation, the responsivity is proportional to /spl omega//sup -1/, at low frequencies /spl sim/ /spl omega//sup -0.5/, and, in the region of intermediate frequencies, the voltage responsivity is independent of frequency.
ISSN:0885-3010
1525-8955
DOI:10.1109/TUFFC.2003.1197970