Coherent optical control of the ultrafast dephasing of phonon-plasmon coupling in a polar semiconductor using a pulse train of below-band-gap excitation

J. D. Lee, Muneaki Hase

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Abstract

In the investigation of the nonequilibrium ultrafast dynamics of the coherent phonon-plasmon coupled modes in a polar semiconductor, we predict theoretically that their coherent oscillations can be efficiently controlled by using the pulse train of below-band-gap excitation. The dynamics of the coherent modes are driven by the virtual electron-hole pairs, which would avoid dephasing sources such as accumulation of photoexcited charges and spontaneous emission. This implies that carrier mobility can also be efficiently controlled and dramatically enhanced by synchronizing the pulse train with the coherent oscillation of the carrier-relevant coupled mode.

Original languageEnglish
Article number235501
JournalPhysical Review Letters
Volume101
Issue number23
DOIs
StatePublished - 4 Dec 2008

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