biostudies-literatureWang LChina Postdoctoral Science Foundation53https://www.ebi.ac.uk/biostudies/studies/S-EPMC8913679biostudies-literatureUnknown11(1)Despite the considerable effort, fast and highly sensitive photodetection is not widely available at the low-photon-energy range (~meV) of the electromagnetic spectrum, owing to the challenging light funneling into small active areas with efficient conversion into an electrical signal. Here, we provide an alternative strategy by efficiently integrating and manipulating at the nanoscale the optoelectronic properties of topological Dirac semimetal PtSe₂ and its van der Waals heterostructures. Explicitly, we realize strong plasmonic antenna coupling to semimetal states near the skin-depth regime (λ/10⁴), featuring colossal photoresponse by in-plane symmetry breaking. The observed spontaneous and polarization-sensitive photocurrent are correlated to strong coupling with tLight, science & applicationsHybrid Dirac semimetal-based photodetector with efficient low-energy photon harvesting.PMC89136792021M692952Politano AZhang KLu WHan LGuo WZhang LJiang MWang LChen ZXing HYao CKuo CNChen YGuo CLue CSChen XYu XfalseHybrid Dirac semimetal-based photodetector with efficient low-energy photon harvesting.Despite the considerable effort, fast and highly sensitive photodetection is not widely available at the low-photon-energy range (~meV) of the electromagnetic spectrum, owing to the challenging light funneling into small active areas with efficient conversion into an electrical signal. Here, we provide an alternative strategy by efficiently integrating and manipulating at the nanoscale the optoelectronic properties of topological Dirac semimetal PtSe₂ and its van der Waals heterostructures. Explicitly, we realize strong plasmonic antenna coupling to semimetal states near the skin-depth regime (λ/10⁴), featuring colossal photoresponse by in-plane symmetry breaking. The observed spontaneous and polarization-sensitive photocurrent are correlated to strong coupling with t2022-01-01T00:00:00Z2022 Mar2025-04-19T09:22:05.171Z2025-04-19T09:22:05.171ZS-EPMC89136793527314510.1038/s41377-022-00741-8