Physics – Condensed Matter
Scientific paper
Jan 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005phrvl..94b7401h&link_type=abstract
Physical Review Letters, vol. 94, Issue 2, id. 027401
Physics
Condensed Matter
32
Time-Resolved Optical Spectroscopies And Other Ultrafast Optical Measurements In Condensed Matter, Ultrafast Processes, Optical Pulse Generation And Pulse Compression, Exchange, Correlation, Dielectric And Magnetic Response Functions, Plasmons, Collective Excitations
Scientific paper
The ultrafast transition of an optical phonon resonance to a coupled phonon-plasmon system is studied. After 10-fs photoexcitation of i-InP, the buildup of coherent beats of the emerging hybrid modes is directly monitored via ultrabroadband THz spectroscopy. The anticrossing is mapped out as a function of time and density. A quantum kinetic theory of microscopic carrier-carrier and carrier-LO-phonon interactions explains the delayed formation of the collective modes. The buildup time is quantitatively reproduced to scale with the oscillation cycle of the upper branch of the coupled resonance.
Amann Markus C.
Haug H.
Huber Richard
Köhler F.
Kübler C.
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