First-principles study of ultrafast dynamics of Dirac plasmon in graphene
Exploring low-loss two-dimensional plasmon modes is considered central for achieving light manipulation at the nanoscale and applications in plasmonic science and technology. In this context, pump–probe spectroscopy is a powerful tool for investigating these collective modes and the corresponding en...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2021-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/abec0f |
| _version_ | 1827872858463797248 |
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| author | Dino Novko |
| author_facet | Dino Novko |
| author_sort | Dino Novko |
| collection | DOAJ |
| description | Exploring low-loss two-dimensional plasmon modes is considered central for achieving light manipulation at the nanoscale and applications in plasmonic science and technology. In this context, pump–probe spectroscopy is a powerful tool for investigating these collective modes and the corresponding energy transfer processes. Here, I present a first-principles study on non-equilibrium Dirac plasmon in graphene, wherein damping channels under ultrafast conditions are still not fully explored. The laser-induced blueshift of plasmon energy is explained in terms of thermal increase of the electron–hole pair concentration in the intraband channel. Interestingly, while damping pathways of the equilibrium graphene plasmon are entirely ruled by scatterings with acoustic phonons, the photoinduced plasmon predominantly transfers its energy to the strongly coupled hot optical phonons, which explains the experimentally-observed tenfold increase of the plasmon linewidth. The present study paves the way for an in-depth theoretical comprehension of plasmon temporal dynamics in novel two-dimensional systems and heterostructures. |
| first_indexed | 2024-03-12T16:29:31Z |
| format | Article |
| id | doaj.art-7d74bdeded4c48e8ba7ede2afe03ac7b |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:29:31Z |
| publishDate | 2021-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-7d74bdeded4c48e8ba7ede2afe03ac7b2023-08-08T15:33:52ZengIOP PublishingNew Journal of Physics1367-26302021-01-0123404302310.1088/1367-2630/abec0fFirst-principles study of ultrafast dynamics of Dirac plasmon in grapheneDino Novko0https://orcid.org/0000-0002-1673-2973Institute of Physics , Bijenička 46, 10000 Zagreb, Croatia; Donostia International Physics Center (DIPC) , Paseo Manuel de Lardizabal 4, 20018 Donostia-San Sebastián, SpainExploring low-loss two-dimensional plasmon modes is considered central for achieving light manipulation at the nanoscale and applications in plasmonic science and technology. In this context, pump–probe spectroscopy is a powerful tool for investigating these collective modes and the corresponding energy transfer processes. Here, I present a first-principles study on non-equilibrium Dirac plasmon in graphene, wherein damping channels under ultrafast conditions are still not fully explored. The laser-induced blueshift of plasmon energy is explained in terms of thermal increase of the electron–hole pair concentration in the intraband channel. Interestingly, while damping pathways of the equilibrium graphene plasmon are entirely ruled by scatterings with acoustic phonons, the photoinduced plasmon predominantly transfers its energy to the strongly coupled hot optical phonons, which explains the experimentally-observed tenfold increase of the plasmon linewidth. The present study paves the way for an in-depth theoretical comprehension of plasmon temporal dynamics in novel two-dimensional systems and heterostructures.https://doi.org/10.1088/1367-2630/abec0fplasmon dynamicselectron–phonon couplingelectron thermalizationgraphene2D materials |
| spellingShingle | Dino Novko First-principles study of ultrafast dynamics of Dirac plasmon in graphene New Journal of Physics plasmon dynamics electron–phonon coupling electron thermalization graphene 2D materials |
| title | First-principles study of ultrafast dynamics of Dirac plasmon in graphene |
| title_full | First-principles study of ultrafast dynamics of Dirac plasmon in graphene |
| title_fullStr | First-principles study of ultrafast dynamics of Dirac plasmon in graphene |
| title_full_unstemmed | First-principles study of ultrafast dynamics of Dirac plasmon in graphene |
| title_short | First-principles study of ultrafast dynamics of Dirac plasmon in graphene |
| title_sort | first principles study of ultrafast dynamics of dirac plasmon in graphene |
| topic | plasmon dynamics electron–phonon coupling electron thermalization graphene 2D materials |
| url | https://doi.org/10.1088/1367-2630/abec0f |
| work_keys_str_mv | AT dinonovko firstprinciplesstudyofultrafastdynamicsofdiracplasmoningraphene |