Active plasmonic switching at mid-infrared wavelengths with graphene ribbon arrays
| Autor: | Chu, Hong-Son, Gan, Choon How |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Appl. Phys. Lett. 102, 231107 (2013) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1063/1.4810003 |
| Popis: | An active plasmonic switch based on single- and few-layer doped graphene ribbon array operating in the mid-infrared spectrum is investigated with theoretical and numerical calculations. It is shown that significant resonance wavelength shifts and modulation depths can be achieved with a slight variation of the doping concentration of the graphene ribbon. The few-layer graphene ribbon array device outperforms the single-layer one in terms of the achievable modulation depth. Our simulations reveal that, by modulating the Fermi-energy level between 0.2 eV and 0.25 eV, a four-layer graphene ribbon array device can achieve a modulation depth and resonance wavelength shift of ~13 dB and 0.94 micron respectively, compared to ~2.8 dB and 1.85 micron for a single-layer device. Additionally, simple fitting models to predict the modulation depth and the resonance wavelength shift are proposed. These prospects pave the way towards ultrafast active graphene-based plasmonic devices for infrared and THz applications. Comment: 8 pages, 3 figures |
| Databáze: | arXiv |
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