Beyond passive transport, graphene and related two-dimensional materials respond strongly to light, and their optical and electronic properties can be coupled in ways that are impossible in conventional semiconductors. We exploit this to engineer devices where optical pulses control electronic resistance states, opening paths towards neuromorphic computing and optical memories.<\/p>\n\n\n\n
Memristors \u2014 devices whose resistance depends on their history \u2014 are a key building block of neuromorphic computing architectures that mimic the synaptic plasticity of biological neural networks. We demonstrate a non-volatile, all-optical memristor based on hBN-encapsulated graphene. Pulsed laser illumination controllably switches the device between multiple distinct, stable resistance states, with each pulse incrementally changing the resistance in a direction determined by the pulse parameters. The switching mechanism is non-destructive, reversible, and operable at room temperature, making this platform directly relevant to optical memory and neuromorphic applications.<\/p>\n\n\n\n
H. K. Mann, M. Mondal, V. Sah, K. Watanabe, T. Taniguchi, A. Singh, Aveek Bid \u2014 npj 2D Mater. Appl. 8, 69 (2024)<\/a> | arXiv:2407.13387<\/a><\/p>\n","protected":false},"excerpt":{"rendered":" Beyond passive transport, graphene and related two-dimensional materials respond strongly to light, and their optical and electronic properties can be coupled in ways that are impossible in conventional semiconductors. We exploit this to engineer devices where optical pulses control electronic resistance states, opening paths towards neuromorphic computing and optical memories. Optical control of multiple resistance […]<\/p>\n","protected":false},"author":4,"featured_media":4952,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[41],"tags":[],"class_list":["post-4943","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research"],"_links":{"self":[{"href":"https:\/\/physics.iisc.ac.in\/~aveek_bid\/wp-json\/wp\/v2\/posts\/4943","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/physics.iisc.ac.in\/~aveek_bid\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/physics.iisc.ac.in\/~aveek_bid\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/physics.iisc.ac.in\/~aveek_bid\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/physics.iisc.ac.in\/~aveek_bid\/wp-json\/wp\/v2\/comments?post=4943"}],"version-history":[{"count":1,"href":"https:\/\/physics.iisc.ac.in\/~aveek_bid\/wp-json\/wp\/v2\/posts\/4943\/revisions"}],"predecessor-version":[{"id":4944,"href":"https:\/\/physics.iisc.ac.in\/~aveek_bid\/wp-json\/wp\/v2\/posts\/4943\/revisions\/4944"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/physics.iisc.ac.in\/~aveek_bid\/wp-json\/wp\/v2\/media\/4952"}],"wp:attachment":[{"href":"https:\/\/physics.iisc.ac.in\/~aveek_bid\/wp-json\/wp\/v2\/media?parent=4943"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/physics.iisc.ac.in\/~aveek_bid\/wp-json\/wp\/v2\/categories?post=4943"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/physics.iisc.ac.in\/~aveek_bid\/wp-json\/wp\/v2\/tags?post=4943"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}