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- W4375959116 abstract "Ultrafast carrier and phonon dynamics at the buried heterointerface of GaP/Si(001) are investigated by means of two-color pump-probe reflectivity measurements. The carrier-induced reflectivity signal exhibits a resonant enhancement at pump-photon energies of 1.4 eV, which can be assigned to an optical transition between electronic interface states. The transient reflectivity is modulated by a coherent oscillation at 2 THz, whose amplitude also becomes maximum at 1.4 eV. The observed resonant behavior of the phonon mode in combination with a characteristic wavelength-dependence of, both, its frequency and initial phase, strongly indicate that the 2-THz mode is a difference-combination mode of a GaP-like and a Si-like phonon at the heterointerface and that this second-order scattering process can be enhanced by a double resonance involving the interfacial electronic states." @default.
- W4375959116 created "2023-05-10" @default.
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- W4375959116 date "2023-05-07" @default.
- W4375959116 modified "2023-09-26" @default.
- W4375959116 title "Strongly coupled interface electronic states and interface phonon mode at GaP/Si(001)" @default.
- W4375959116 doi "https://doi.org/10.48550/arxiv.2305.04362" @default.
- W4375959116 hasPublicationYear "2023" @default.
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