Event detection via THz generation with flat nonlinear optics [Invited]
Year: 2025
Authors: Leon UA., Franceschini P., Sergaeva O., Tognazzi A., Rocco D., Carletti L., de Ceglia D., Della Valle G., De Angelis C.
Autors Affiliation: Politecn Milan, Dept Phys, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy; Univ Brescia, Dept Informat Engn, Via Branze 38, I-25123 Brescia, Italy; CNR, Natl Inst Opt INO, Via Branze 45, I-25123 Brescia, Italy; Univ Palermo, Dipartimento Ingn, Viale Sci, I-90128 Palermo, Italy; Consiglio Nazl Ric CNR, Inst Photon & Nanotechnol, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy; Ist Nazl Fis Nucl, INFN Sez Milano, Via Celoria 16, I-20133 Milan, Italy.
Abstract: Event detection is a key feature in many applications and is often achieved digitally by comparing sequential frames and detecting changes or patterns that signify an event. While digital systems dominate most applications, optical analog methods are receiving increasing attention in areas requiring speed or operation in challenging conditions. Here we demonstrate how a simple thin film of AlGaAs can be used to realize ultrafast event detection by exploiting the THz signal generated by the difference-frequency of optical events. (c) 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
Journal/Review: OPTICAL MATERIALS EXPRESS
Volume: 15 (2) Pages from: 307 to: 318
More Information: PRIN (P2022RFF9K, 2022BC5BW5, 2022H7RR4F, 2020EY2LJT) ; Horizon 2020 Framework Programme (899673) ; Italian National Recovery and Resilience Plan (NRRP) -NextGenerationEU (PE00000001, C79J24000190004) .KeyWords: Far-infrared Generation; RectificationDOI: 10.1364/OME.543944Citations: 2data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2025-05-18References taken from IsiWeb of Knowledge: (subscribers only)
