| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5364686 | Applied Surface Science | 2007 | 4 Pages |
Abstract
Ultrafast time-resolved reflectivity of a bismuth thin film evaporated on a silicon substrate is measured to investigate coherent phonons in bismuth. The reflectivity result is analyzed by a linear chirp approximation to obtain the time dependent frequencies of coherent phonons. Not only the optical modes are detected, which are generated by a combination of impulsive stimulated Raman scattering and displacive excitation of coherent phonon, acoustic phonon modes are also observed, which are emitted by the A1g optical phonon.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Alexander Q. Wu, Xianfan Xu,