Terahertz 3D printed diffractive lens matrices for field-effect transistor detector focal plane arrays
K. Szkudlarek , Maciej Sypek , G. Cywiński , Jarosław Suszek , P Zagrajek , A. Feduniewicz-Zmuda , I. Yahniuk , S. Yatsunenko , A. Nowakowska-Siwińska , D Coquillat , D.B. But , M. Rachoń , K. Wegrzyńska , C. Skierbiszewski , W Knap
AbstractWe present the concept, the fabrication processes and the experimental results for materials and optics that can be used for terahertz field-effect transistor detector focal plane arrays. More specifically, we propose 3D printed arrays of a new type - diffractive multi-zone lenses of which the performance is superior to that of previously used mono-zone diffractive or refractive elements and evaluate them with GaN/AlGaN field-effect transistor terahertz detectors. Experiments performed in the 300-GHz atmospheric window show that the lens arrays offer both a good efficiency and good uniformity, and may improve the signal-to-noise ratio of the terahertz field-effect transistor detectors by more than one order of magnitude. In practice, we tested 3 x 12 lens linear arrays with printed circuit board THz detector arrays used in postal security scanners and observed significant signal-to-noise improvements. Our results clearly show that the proposed technology provides a way to produce cost-effective, reproducible, flat optics for large-size field-effect transistor THz-detector focal plane arrays. ©2016 Optical Society of America.
|Journal series||Optics Express, ISSN 1094-4087|
|Keywords in English||3D printers; Cost effectiveness; Focal plane arrays; Focusing; Printed circuit boards; Signal to noise ratio; Transistors, Atmospheric window; Diffractive lens; Fabrication process; Refractive elements; Security scanner; Signal to noise improvements; Terahertz detectors; Terahertz fields, Field effect transistors|
|Score|| = 40.0, 06-12-2019, ArticleFromJournal|
= 45.0, 06-12-2019, ArticleFromJournal
|Publication indicators||= 8; = 9; : 2016 = 1.544; : 2016 = 3.307 (2) - 2016=3.436 (5)|
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