Abstract
We demonstrate a new time-domain surface phonon spectroscopy. We excite coherent surface optical phonons with an ultrashort laser pulse and probe the free-induction decay with time-resolved surface second-harmonic generation. For both clean GaAs (110) and (100) surfaces, the signals are remarkably large due to the highly localized electron-phonon interaction at the surface and the intrinsic surface sensitivity of second-harmonic generation. This work suggests that coherent oscillations of surface optical phonons may be used as probes of electron-phonon interactions at surfaces and to control or drive nonthermal surface chemical reactions.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
