Abstract
We investigate the dynamics of coherent phonons in bismuth under high-density excitation with a pump–probe technique. As the pump power density is increased, the E g mode appears in addition to the A 1g mode, and the A 1g mode in the Fourier-transformed spectra is asymmetrically broadened. Analysis based on a time-partitioning Fourier transformation reveals that the frequency of the coherent A 1g phonon is instantaneously downshifted upon the excitation and that the line shape of the A 1g mode changes from an asymmetric to symmetric one as the coherent oscillation decays. These behaviors of the coherent phonons are attributed to anharmonicity of the lattice vibrations.
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.
