Effect of phase modulation of a laser pulse on the generation of a coherent totally symmetric phonon in a tellurium single crystal

• Published in: Physics of the solid state Vol. 49; no. 11; pp. 2171 - 2176
• Main Authors: Misochko, O. V., Andreev, S. V., Kompanets, V. O., Matveets, Yu. A., Stepanov, A. G., Chekalin, S. V., Dekorsy, T.
• Format: Journal Article
• Language: English
• Published: New York Springer Nature B.V 01-11-2007
• Subjects: Amplitudes; Chirp; Coherence; Oscillations; Phase modulation; Phonons; Single crystals; Tellurium
• ISSN: 1063-7834; 1090-6460
• DOI: 10.1134/S106378340711025X

The effect of phase modulation (resulting in a chirp of an ultrashort laser pulse) on the generation of a coherent A1 phonon in Te was studied. The amplitude of coherent oscillations was found to depend on the sign and value of the pulse chirp: the oscillation amplitude decreases as the chirp increases. For a positive chirp, this effect is twofold stronger than for a negative one. The frequency-resolved response of a bandwidth-limited pulse was studied, which revealed the difference of oscillations and the relaxation response for the Stokes and anti-Stokes frequencies. The detected phenomena can be used for coherent control of lattice dynamics.