Title

Infrared Antennas Coupled To Lithographic Fresnel Zone Plate Lenses

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.

Publication Date

11-20-2004

Publication Title

Applied Optics

Volume

43

Issue

33

Number of Pages

6067-6073

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/AO.43.006067

Socpus ID

10444248941 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/10444248941

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