Title

Antenna-Coupled Infrared Detectors For Imaging Applications

Keywords

Antenna-coupled detectors; Fresnel zone plate lenses; Infrared focal plane array (IRFPA); Microbolometer

Abstract

Infrared focal plane arrays (IRFPAs) are a critical component in advanced infrared imaging systems. IRFPAs are made up of two parts, a detector array and a readout integrated circuit (ROIC) multiplexer. Current ROIC technology has typical pitch sizes of 20 × 20 to 50 × 50 μm 2. In order to make antenna-coupled detectors suited for infrared imaging systems, two-dimensional (2-D) arrays have been fabricated that cover a whole pixel area with the penalty of increasing the noise figure of the detector and, therefore, reducing its performance. By coupling a Fresnel zone plate lens to a single element antenna-coupled detector, infrared radiation can be collected over a typical pixel area and still keep low-noise levels. A Fresnel zone plate lens coupled to a single-element square-spiral-coupled infrared detector has been fabricated and its performance compared to single element antenna-coupled detectors and 2-D arrays of antenna coupled detectors. Measurements made at 10.6 μm showed a two-order-of-magnitude increase in SNR and a ∼ 3× increase in D* as compared to 2-D arrays of antenna-coupled detectors.

Publication Date

1-1-2005

Publication Title

IEEE Journal on Selected Topics in Quantum Electronics

Volume

11

Issue

1

Number of Pages

117-120

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/JSTQE.2004.841474

Socpus ID

14544300154 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/14544300154

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