Selective enhancement of coherent optical phonons using THz-rate pulse train
Muneaki Hase, Tetsuya Itano, Kohji Mizoguchi, and Shin-ichi Nakashima
TL;DR
This paper demonstrates the selective enhancement of specific coherent optical phonons in Bi-Sb crystals using tailored THz-rate pulse trains generated by spatial phase modulation, enabling control over vibrational modes.
Contribution
It introduces a method to selectively enhance or cancel specific phonon modes using shaped THz pulse trains with a liquid-crystal spatial light modulator.
Findings
Selective enhancement of Bi-Bi, Bi-Sb, and Sb-Sb vibrations achieved.
Pulse train shape influences phonon mode control.
Method allows for targeted vibrational mode manipulation.
Abstract
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.
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