Infrared antennas coupled to lithographic Fresnel zone plate lenses Article

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Overview

abstract

• Several designs for Fresnel zone plate lenses (FZPLs) to be used in conjunction with antenna-coupled infrared detectors have been fabricated and tested. The designs comprise square and circular FZPLs with different numbers of Fresnel zones working in transmissive or reflective modes designed to focus infrared energy on a square-spiral antenna connected to a microbolometer. A 163× maximum increase in response was obtained from a 15-zone circular FZPL in the transmissive mode. Sensor measurements of normalized detectivity D* resulted in a 2.67× increase with FZPLs compared with measurements made of square-spiral antennas without FZPLs. The experimental results are discussed and compared with values obtained from theoretical calculations. © 2004 Optical Society of America.

authors

• Alda J.
• Boreman G.D.
• González Contreras Francisco Javier
• Ilic B.

publication date

• 2004-01-01

published in

• Applied Optics  Journal

Research

keywords

• Antennas; Bolometers; Computer simulation; Frequencies; Infrared detectors; Spectrum analysis; Fresnel zone plate lenses (FZPL); Infrared antennas; Microbolometers; Square-spiral antennas; Lenses

Identity

Digital Object Identifier (DOI)

• 10.1364/AO.43.006067

Additional Document Info

start page

• 6067

end page

• 6073

volume

• 43

issue

• 33