%0 Conference Paper %D 2007 %T Transient picometer atomic displacements in a-Te photoexcited by femtosecond laser pulses %A S. Kudryashov %A M. Kandyla %A C. A. D. Roeser %A Mazur, E. %K Belarus %K Minsk %X Subpicosecond, picometer atomic displacements in α-Те photoexcited by single femtosecond laser pulses have been measured by means of time-resolved optical reflectometry revealing threshold- like coherent quantum emission of single softened fully symmetrical optical A1-phonons and demonstrating absolute detection capability of this technique in studies of coherent phonon dynamics in solids. %I International conference on coherent and nonlinear optics, Proceedings of SPIE Vol. 6727 %G eng %U /files/mazur/files/rep_615.pdf