Frequency-selective excitation of high-wavevector phonons

Frequency-selective excitation of high-wavevector phonons

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 ph...

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Veröffentlicht in:Applied physics letters 2018-10, Vol.113 (17)
Hauptverfasser: Teitelbaum, Samuel W., Henighan, Thomas, Liu, Hanzhe, Jiang, Mason P., Kozina, Michael, Zhu, Diling, Chollet, Matthieu, Sato, Takahiro, Glownia, James M., Trigo, Mariano, Reis, David A.
Format: Artikel
Sprache:eng
Schlagworte:
Applied physics
Brillouin zones
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Excitation
Fabry-Perot interferometers
inelastic scattering
MATERIALS SCIENCE
optical interference
Phonons
quantum optics
spectrograms
ultrafast lasers
X-ray diffuse scattering
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Zusammenfassung: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.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.5047447