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- Title
Coherent Generation of Photo-Thermo-Acoustic Wave from Graphene Sheets.
- Authors
Tian, Yichao; Tian, He; Wu, Y. L.; Zhu, L. L.; Tao, L. Q.; Zhang, W.; Shu, Y.; Xie, D.; Yang, Y.; Wei, Z. Y.; Lu, X. H.; Ren, Tian-Ling; Shih, Chih-Kang; Zhao, Jimin
- Abstract
Many remarkable properties of graphene are derived from its large energy window for Dirac-like electronic states and have been explored for applications in electronics and photonics. In addition, strong electron-phonon interaction in graphene has led to efficient photo-thermo energy conversions, which has been harnessed for energy applications. By combining the wavelength independent absorption property and the efficient photo-thermo energy conversion, here we report a new type of applications in sound wave generation underlined by a photo-thermo-acoustic energy conversion mechanism. Most significantly, by utilizing ultrafast optical pulses, we demonstrate the ability to control the phase of sound waves generated by the photo-thermal-acoustic process. Our finding paves the way for new types of applications for graphene, such as remote non-contact speakers, optical-switching acoustic devices, etc.
- Subjects
SOUND waves; PHOTONICS; GRAPHENE; ELECTRON-phonon interactions; ENERGY conversion
- Publication
Scientific Reports, 2015, p10582
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/srep10582