Ultrafast nonlinear optical response of Dirac fermions in graphene
The speed of solid-state electronic devices, determined by the temporal dynamics of charge carriers, could potentially reach unprecedented petahertz frequencies through direct manipulation by optical fields, consisting in a million-fold increase from state-of-the-art technology. In graphene, charge...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
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Nature Publishing Group
2018
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| Online Access: | http://hdl.handle.net/1721.1/118898 https://orcid.org/0000-0002-4268-731X |
| _version_ | 1811079964617867264 |
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| author | Baudisch, Matthias Marini, Andrea Cox, Joel D. Silva, Francisco Teichmann, Stephan Massicotte, Mathieu Koppens, Frank García de Abajo, F. Javier Biegert, Jens Zhu, Tony Levitov, Leonid |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Baudisch, Matthias Marini, Andrea Cox, Joel D. Silva, Francisco Teichmann, Stephan Massicotte, Mathieu Koppens, Frank García de Abajo, F. Javier Biegert, Jens Zhu, Tony Levitov, Leonid |
| author_sort | Baudisch, Matthias |
| collection | MIT |
| description | The speed of solid-state electronic devices, determined by the temporal dynamics of charge carriers, could potentially reach unprecedented petahertz frequencies through direct manipulation by optical fields, consisting in a million-fold increase from state-of-the-art technology. In graphene, charge carrier manipulation is facilitated by exceptionally strong coupling to optical fields, from which stems an important back-action of photoexcited carriers. Here we investigate the instantaneous response of graphene to ultrafast optical fields, elucidating the role of hot carriers on sub-100 fs timescales. The measured nonlinear response and its dependence on interaction time and field polarization reveal the back-action of hot carriers over timescales commensurate with the optical field. An intuitive picture is given for the carrier trajectories in response to the optical-field polarization state. We note that the peculiar interplay between optical fields and charge carriers in graphene may also apply to surface states in topological insulators with similar Dirac cone dispersion relations. |
| first_indexed | 2024-09-23T11:23:19Z |
| format | Article |
| id | mit-1721.1/118898 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T11:23:19Z |
| publishDate | 2018 |
| publisher | Nature Publishing Group |
| record_format | dspace |
| spelling | mit-1721.1/1188982022-10-01T03:16:19Z Ultrafast nonlinear optical response of Dirac fermions in graphene Baudisch, Matthias Marini, Andrea Cox, Joel D. Silva, Francisco Teichmann, Stephan Massicotte, Mathieu Koppens, Frank García de Abajo, F. Javier Biegert, Jens Zhu, Tony Levitov, Leonid Massachusetts Institute of Technology. Department of Physics Zhu, Tony Levitov, Leonid The speed of solid-state electronic devices, determined by the temporal dynamics of charge carriers, could potentially reach unprecedented petahertz frequencies through direct manipulation by optical fields, consisting in a million-fold increase from state-of-the-art technology. In graphene, charge carrier manipulation is facilitated by exceptionally strong coupling to optical fields, from which stems an important back-action of photoexcited carriers. Here we investigate the instantaneous response of graphene to ultrafast optical fields, elucidating the role of hot carriers on sub-100 fs timescales. The measured nonlinear response and its dependence on interaction time and field polarization reveal the back-action of hot carriers over timescales commensurate with the optical field. An intuitive picture is given for the carrier trajectories in response to the optical-field polarization state. We note that the peculiar interplay between optical fields and charge carriers in graphene may also apply to surface states in topological insulators with similar Dirac cone dispersion relations. 2018-11-05T20:28:19Z 2018-11-05T20:28:19Z 2018-03 2017-12 2018-10-10T14:07:50Z Article http://purl.org/eprint/type/JournalArticle 2041-1723 http://hdl.handle.net/1721.1/118898 Baudisch, Matthias et al. “Ultrafast Nonlinear Optical Response of Dirac Fermions in Graphene.” Nature Communications 9, 1 (March 2018): 1018 © 2018 The Author(s) https://orcid.org/0000-0002-4268-731X http://dx.doi.org/10.1038/S41467-018-03413-7 Nature Communications Creative Commons Attribution 4.0 International License http://creativecommons.org/licenses/by/4.0/ application/pdf Nature Publishing Group Nature |
| spellingShingle | Baudisch, Matthias Marini, Andrea Cox, Joel D. Silva, Francisco Teichmann, Stephan Massicotte, Mathieu Koppens, Frank García de Abajo, F. Javier Biegert, Jens Zhu, Tony Levitov, Leonid Ultrafast nonlinear optical response of Dirac fermions in graphene |
| title | Ultrafast nonlinear optical response of Dirac fermions in graphene |
| title_full | Ultrafast nonlinear optical response of Dirac fermions in graphene |
| title_fullStr | Ultrafast nonlinear optical response of Dirac fermions in graphene |
| title_full_unstemmed | Ultrafast nonlinear optical response of Dirac fermions in graphene |
| title_short | Ultrafast nonlinear optical response of Dirac fermions in graphene |
| title_sort | ultrafast nonlinear optical response of dirac fermions in graphene |
| url | http://hdl.handle.net/1721.1/118898 https://orcid.org/0000-0002-4268-731X |
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