Selective enhancement of coherent optical phonons in Bi-Sb mixed crystals has been performed using terahertz (THz) rate pulse trains generated by spatial phase modulation of femtosecond pulse with a liquid-crystal spatial light modulator. The profile of the shaped pulse train has a flat-toped shape. The Bi-Bi, Bi-Sb, and Sb-Sb vibrations can be enhanced and canceled selectively for pulse trains with a suitable repetition rate.
@article{arxiv.1011.3611,
title = {Selective enhancement of coherent optical phonons using THz-rate pulse train},
author = {Muneaki Hase and Tetsuya Itano and Kohji Mizoguchi and Shin-ichi Nakashima},
journal= {arXiv preprint arXiv:1011.3611},
year = {2010}
}