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Coherent Generation of Photo-Thermo-Acoustic Wave from Graphene Sheets.

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.

SUBMITTER: Tian Y

PROVIDER: S-EPMC4650607 | biostudies-other | 2015

REPOSITORIES: biostudies-other

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Coherent Generation of Photo-Thermo-Acoustic Wave from Graphene Sheets.

Tian Yichao Y Tian He H Wu Y L YL Zhu L L LL Tao L Q LQ Zhang W W Shu Y Y Xie D D Yang Y Y Wei Z Y ZY Lu X H XH Ren Tian-Ling TL Shih Chih-Kang CK Zhao Jimin J

Scientific reports 20150608

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 i ...[more]

PMID: 26053560

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