Effect of phase modulation of a laser pulse on the generation of a coherent totally symmetric phonon in a tellurium single crystal |
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| Authors: | O V Misochko S V Andreev V O Kompanets Yu A Matveets A G Stepanov S V Chekalin T Dekorsy |
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| Institution: | (1) Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia;(2) Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow oblast, 142190, Russia;(3) Physics Department, Konstanz University, Konstanz, 78457, Germany |
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| Abstract: | The effect of phase modulation (resulting in a chirp of an ultrashort laser pulse) on the generation of a coherent A 1 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. |
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