biostudies-literatureUnknown5Tian YMany 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 typeScientific reports10582https://www.ebi.ac.uk/biostudies/studies/S-EPMC4650607biostudies-literatureCoherent Generation of Photo-Thermo-Acoustic Wave from Graphene Sheets.PMC4650607Shih CKTao LQLu XHTian HWu YLZhang WXie DWei ZYRen TLYang YTian YZhu LLShu YZhao JfalseCoherent Generation of Photo-Thermo-Acoustic Wave from Graphene Sheets.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 type2015-01-01T00:00:00Z2015 Jun2025-04-04T07:52:26.449Z2019-03-27T02:02:16ZS-EPMC46506072605356010.1038/srep10582