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We examine the electromagnetic emission from two photo-illuminated linear arrays composed of inductively charged superconducting ring elements. The arrays are illuminated by an ultrafast infrared laser that triggers microwave broadband emission detected in the 1–26 GHz range. Based on constructive interference from the arrays a narrowing of the forward radiation lobe is observed with increasing element count and frequency demonstrating directed GHz emission. Results suggest that higher frequencies and a larger number of elements are achievable leading to a unique pulsed array emitter concept that can span frequencies from the microwave to the terahertz (THz) regime.


This article will appear in the December 2023 issue of Scientific Reports, a SpringerNature journal. The download on this page is the PDF of the published article. An interactive HTML edition of the article is available from the publisher via the DOI link below.

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Funding note: This work was supported (or partially supported or also supported) by Air Force Office of Scientific Research (AFOSR) Award Nos. FA9550-23AFCOR001 and 18RQCOR100.

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Scientific Reports