The concept of absorption by a metal-dielectric-metal structure is reexamined. The absorber system is modeled as a transparent medium between two absorbing films. We study the conditions for the parameters that ensure null reflectance and transmittance for a fixed wavelength of the incident radiation, and we present explicit expressions for the absorptance in each film. The absorption optimum conditions in a range of wavelengths are also analyzed.
© 1994 Optical Society of America
J. J. Monzón and L. L. Sánchez-Soto, "Optical performance of absorber structures for thermal detectors," Appl. Opt. 33, 5137-5141 (1994)