Frequency-selective excitation of high-wavevector phonons
| Autor: | Thomas Henighan, Michael Kozina, Takahiro Sato, Hanzhe Liu, Mason Jiang, James M. Glownia, Matthieu Chollet, David A. Reis, Samuel W. Teitelbaum, Mariano Trigo, Diling Zhu |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) Phonon Frequency band Physics::Optics chemistry.chemical_element Germanium 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Pulse (physics) Brillouin zone Momentum Condensed Matter::Materials Science Interferometry chemistry 0103 physical sciences Wave vector Atomic physics 010306 general physics 0210 nano-technology |
| Zdroj: | Applied Physics Letters. 113:171901 |
| ISSN: | 1077-3118 0003-6951 |
| Popis: | We demonstrate the selective excitation of a narrow frequency band of TA phonons throughout the Brillouin zone of germanium using a sinusoidally modulated picosecond laser pulse. The pulse is produced through the combination of two chirped and delayed pulses using a stabilized interferometer. The phonon excitations are probed by time- and momentum- resolved x-ray diffuse scattering. |
| Databáze: | OpenAIRE |
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