Title :
Theoretical investigation for coherent phonon generation studied with first-principles calculation
Author :
Shinohara, Yasushi ; Yabana, Kazuhiro ; Otobe, Tomohito ; Iwata, Jun-Ichi ; Bertsch, George F.
Author_Institution :
Graduated Sch. of Pure & Appl. Sci., Univ. of Tsukuba, Tsukuba, Japan
Abstract :
We investigate mechanisms of coherent phonon generation in time-dependent density functional theory. It is shown that stimulated Raman and displacive excitation mechanisms are understood in a unified way.
Keywords :
ab initio calculations; antimony; density functional theory; elemental semiconductors; energy gap; excited states; high-speed optical techniques; phonons; silicon; stimulated Raman scattering; Sb; Si; band gap; coherent phonon generation; displacive excitation mechanisms; first-principles calculation; stimulated Raman scattering; time-dependent density functional theory; ultrashort laser pulses; Electric fields; Force; Laser excitation; Phonons; Photonic band gap; Silicon;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2012 Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4673-1839-6
