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Computation of current response of a bimorph pyroelectric infrared detector

A. K. BATRA1,* , PADMAJA GUGGILLA1, M. DOKHANIAN1, M. D. AGGARWAL1, M. E. EDWARDS1, A. VASEASHTA2

Affiliation

  1. Department of Physics, PO Box 1268, Alabama A&M University, Normal, AL 35762
  2. Institute for Advanced Sciences Convergence, 13873 Park Center Rd. Herndon, VA 20171

Abstract

Recently, it has been proposed that bimorph detector structure has potential to demonstrate better pyroelectric performance than monomorph. In this context, a one-dimension thermal diffusion equation has been solved for an n-layered structure for pyroelectric bimorph films. In such a system performance of any number of layers of a detector structure can be derived, predicted, and optimized using these computations. Using viable bimorph element sensor configurations and materials parameter, the calculated and predicted current responsivity and other parameters are presented. It is predicted that greater enhancement of the bimorph current responsivity relative to that of monomorph with the well-known pyroelectric materials require higher modulating frequency or thicker bottom (lower) pyroelectric layer of the bimorph detector structure..

Keywords

Thermal modeling, Pyroelectric, Infrared detectors, Current responsivity.

Submitted at: April 2, 2010
Accepted at: May 26, 2010

Citation

A. K. BATRA, PADMAJA GUGGILLA, M. DOKHANIAN, M. D. AGGARWAL, M. E. EDWARDS, A. VASEASHTA, Computation of current response of a bimorph pyroelectric infrared detector, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 5, pp. 1165-1169 (2010)