Dynamic local strain in graphene generated by surface acoustic waves
We experimentally demonstrate that the Raman active optical phonon modes of single layer graphene can be modulated by the dynamic local strain created by surface acoustic waves (SAWs). In particular, the dynamic strain field of the SAW is shown to induce a Raman scattering intensity variation as lar...
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| creator | Fandan, Rajveer Pedrós, Jorge Hernández-Mínguez, Alberto Iikawa, Fernando Santos, Paulo V Boscá, Alberto Calle, Fernando |
| description | We experimentally demonstrate that the Raman active optical phonon modes of single layer graphene can be modulated by the dynamic local strain created by surface acoustic waves (SAWs). In particular, the dynamic strain field of the SAW is shown to induce a Raman scattering intensity variation as large as 15% and a phonon frequency shift of up to 10 cm\(^{-1}\) for the G band, for instance, for an effective hydrostatic strain of 0.24% generated in a single layer graphene atop a LiNbO\(_{3}\) piezoelectric substrate with a SAW resonator operating at a frequency of \( \sim \) 400 MHz. Thus, we demonstrate that SAWs are powerful tools to modulate the optical and vibrational properties of supported graphene by means of the high-frequency localized deformations tailored by the acoustic transducers, which can also be extended to other 2D systems. |
| doi_str_mv | 10.48550/arxiv.1909.12685 |
| format | Article |
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| subjects | Frequency shift Graphene Optical properties Phonons Physics - Materials Science Physics - Mesoscale and Nanoscale Physics Physics - Optics Piezoelectricity Raman spectra Substrates Surface acoustic wave devices Surface acoustic waves Transducers |
| title | Dynamic local strain in graphene generated by surface acoustic waves |
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