Observation of strong magneto plasmonic nonlinearity in bilayer graphene discs
| Autor: | Dmitry Turchinovich, Sebastian Matschy, Hassan A. Hafez, Kevin M. Daniels, Jayaprakash Poojali, Florian Stawitzki, Matthew T. Dejarld, H. Dennis Drew, Matthew L. Chin, Stephan Winnerl, Gagan Kumar, Thomas E. Murphy, Rachael L. Myers-Ward, Martin Mittendorff |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Condensed matter physics Graphene Cyclotron resonance nonlinearity Physics::Optics Resonance THz nonlinearity Physik (inkl. Astronomie) Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Magnetic field law.invention THz pump-probe magneto plasmons law tunable graphene plasmonics Electrical and Electronic Engineering Absorption (electromagnetic radiation) Bilayer graphene Magneto Plasmon |
| Zdroj: | Journal of Physics: Photonics. 3:01LT01 |
| ISSN: | 2515-7647 |
| DOI: | 10.1088/2515-7647/abd7d0 |
| Popis: | Graphene patterned into plasmonic structures like ribbons or discs strongly increases the linear and nonlinear optical interaction at resonance. The nonlinear optical response is governed by hot carriers, leading to a red-shift of the plasmon frequency. In magnetic fields, the plasmon hybridizes with the cyclotron resonance, resulting in a splitting of the plasmonic absorption into two branches. Here we present how this splitting can be exploited to tune the nonlinear optical response of graphene discs. In the absence of a magnetic field, a strong pump-induced increase in on-resonant transmission can be observed, but fields in the range of 3 T can change the characteristics completely, leading to an inverted nonlinearity. A two temperature model is provided that describes the observed behavior well. |
| Databáze: | OpenAIRE |
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