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.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Tian Y,Tian H,Wu YL,Zhu LL,Tao LQ,Zhang W,Shu Y,Xie D,Yang Y,Wei ZY,Lu XH,Ren TL,Shih CK,Zhao J

doi

10.1038/srep10582

subject

Has Abstract

pub_date

2015-06-08 00:00:00

pages

10582

issn

2045-2322

pii

srep10582

journal_volume

5

pub_type

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