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Photonic techniques for neuromorphic computing hardware are attracting increasing research interest, thanks to their potentials for ultra high bandwidths, low crosstalk, and high parallelism. Among these, approaches based upon resonant tunneling diodes (RTDs) have recently gained attention as potential building blocks for next\u2010generation light\u2010enabled neuromorphic hardware, due to their capacity to replicate key neuronal behaviors such as excitable spiking and refractoriness, added to their potentials for high operational speeds, energy efficiency and compact footprints. In particular, their ability to function as opto\u2010electronic spiking neurons makes them strong candidates for integration into novel event\u2010based neuromorphic computing systems. This work demonstrates the application of optically triggered spiking RTD neurons to a multiplicity of applications and architectures; these include systems based upon single elements for multimodal (photonic\u2010electronic) fast rising edge\u2010detection in time\u2010series data, the construction of a two\u2010layer feedforward artificial photonic spiking neural network (pSNN) using RTD neurons as the nonlinear nodes delivering excellent performance in complex dataset classification tasks, and a pSNN comprised of multiple coupled light\u2010sensitive RTD spiking neurons that supports performance as an adjustable neuromorphic optical spiking memory system with a tunable storage time of spiking patterns.<\/jats:p>","DOI":"10.1002\/aisy.202500800","type":"journal-article","created":{"date-parts":[[2026,2,9]],"date-time":"2026-02-09T05:56:11Z","timestamp":1770616571000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Neuromorphic Photonic Processing and Memory With Spiking Resonant Tunneling Diode Neurons and Neural Networks"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6592-8465","authenticated-orcid":false,"given":"Dafydd","family":"Owen\u2010Newns","sequence":"first","affiliation":[{"name":"Institute of Photonics University of Strathclyde  Glasgow UK"}]},{"given":"Joshua","family":"Robertson","sequence":"additional","affiliation":[{"name":"Institute of Photonics University of Strathclyde  Glasgow UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6156-8394","authenticated-orcid":false,"given":"Giovanni","family":"Donati","sequence":"additional","affiliation":[{"name":"Institute of Photonics University of Strathclyde  Glasgow UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5741-0527","authenticated-orcid":false,"given":"Qusay","family":"Al\u2010Taai","sequence":"additional","affiliation":[{"name":"Division of Electronics and Nanoscale Engineering School of Engineering University of Glasgow  Glasgow UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9818-0315","authenticated-orcid":false,"given":"Jos\u00e9","family":"Figueiredo","sequence":"additional","affiliation":[{"name":"Departamento de F\u00edsica da Faculdade de Ci\u00eancias da Universidade de Lisboa  Lisbon Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5014-342X","authenticated-orcid":false,"given":"Edward","family":"Wasige","sequence":"additional","affiliation":[{"name":"Division of Electronics and Nanoscale Engineering School of Engineering University of Glasgow  Glasgow UK"}]},{"given":"Kathy","family":"L\u00fcdge","sequence":"additional","affiliation":[{"name":"Institut f\u00fcr Theoretische Physik Technische Universit\u00e4t Ilmenau  Ilmenau Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1485-6665","authenticated-orcid":false,"given":"Bruno","family":"Romeira","sequence":"additional","affiliation":[{"name":"International Iberian Nanotechnology Laboratory  Braga Portugal"}]},{"given":"Antonio","family":"Hurtado","sequence":"additional","affiliation":[{"name":"Institute of Photonics University of Strathclyde  Glasgow UK"}]}],"member":"311","published-online":{"date-parts":[[2026,2,8]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1109\/JPROC.2014.2304638"},{"key":"e_1_2_10_3_1","unstructured":"S.H\u00f6ppner Y.Yan A.Dixius et al. \u201cThe Spinnaker 2 Processing Element Architecture for Hybrid Digital Neuromorphic Computing \u201d2022."},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1109\/MC.2019.2903009"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.adh1174"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.1109\/MM.2018.112130359"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.1109\/SiPS52927.2021.00053"},{"key":"e_1_2_10_8_1","unstructured":"D.Brunner B. 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