2021/11/29 by S. Biswas, Shubhadeep Biswas, Biswas, Shubhadeep +42
Chemistry · Engineering · Materials Science · Physics and Astronomy · #Atomic Physics (physics.atom-ph) #Atomic physics #Attosecond #Carbon Nanotubes in Composites #Delocalized electron #Electron #Excitation #FOS: Physical sciences #Fullerene Chemistry and Applications #Graphene #Ion-surface interactions and analysis #Laser #Laser-Ablation Synthesis of Nanoparticles #Laser-Matter Interactions and Applications #Materials science #Nanoparticle #Optics #Optics (physics.optics) #Optoelectronics #Physics #Plasmon #Quantum Physics (quant-ph) #Quantum mechanics #Resonance (particle physics) #Surface plasmon resonance #Ultrashort pulse #physics.atom-ph #physics.optics #quant-ph
paper · pdf · doi:10.48550/arxiv.2111.14464
published in arXiv (Cornell University) (Cornell University)
arxiv created 2021/11/29 · openalex publication_date 2021/11/29 · arxiv updated 2021/11/30 · openalex created_date 2022/07/25 · openalex updated_date 2026/08/08
Fullerenes have unique physical and chemical properties that are associated\nwith their delocalized conjugated electronic structure. Among them, there is a\ngiant ultra-broadband - and therefore ultrafast - plasmon resonance, which for\nC60 is in the extreme-ultraviolet energy range. While this peculiar\nresonance has attracted considerable interest for the potential downscaling of\nnanoplasmonic applications such as sensing, drug delivery and photocatalysis at\nthe atomic level, its electronic character has remained elusive. The ultrafast\ndecay time of this collective excitation demands attosecond techniques for\nreal-time access to the photoinduced dynamics. Here, we uncover the role of\nelectron correlations in the giant plasmon resonance of C60 by employing\nattosecond photoemission chronoscopy. We find a characteristic photoemission\ndelay of up to 200 attoseconds pertaining to the plasmon that is purely induced\nby coherent large-scale correlations. This result provides novel insight into\nthe quantum nature of plasmonic resonances, and sets a benchmark for advancing\nnanoplasmonic applications.\n