Ultrafast movies of atomic motion with femtosecond laser-based x-rays

Conference item

Using ultrafast x-ray diffraction from a laser-plasma x-ray source, we have observed coherent phonon generation and propagation in bulk(111)-GaAs, (111)-Ge, and thin (Ill)-Ge-on-Si films. At higher optical pump fluences, ultrafast melting of Ge films is observed.

Authors: Siders, C; Cavalleri, A; Sokolowski-Tinten, K; Guo, T; Toth, C

• Journal: P SOC PHOTO-OPT INS
• Volume: 3776
• Pages: 302-311
• Publication date: 1999-01-01
• Event title: 3rd Conference on Soft X-Ray Lasers and Application
• Keywords: GALLIUM-ARSENIDE; LATTICE INSTABILITY; LO PHONONS; X-ray; SEMICONDUCTOR; GENERATION; PHONON OSCILLATIONS; SILICON; STRUCTURAL DYNAMICS; TI-SAPPHIRE LASER; SOLID-STATE; DIFFRACTION; PICOSECOND LIGHT-PULSES; ULTRAFAST; OPTICAL PULSES