Ultrashort-pulse modulation in adiabatically prepared Raman media.
We demonstrate the efficient modulation of an approximately 100-femtosecond pulse in a Raman medium coherently prepared by nanosecond pulses. Raman sidebands of the ultrashort pulse spanning 360 THz are generated with an efficiency of >5%. We show that the mechanism permitting the sidebands to be generated is the preparation of a significant vibrational coherence in the medium that is robust to disturbance by an intense short pulse. If the observed sidebands were phase compensated, they would form a short train of approximately ten 3-fs pulses. Focusing would permit the realization of a peak intensity of >10(13) W cm(-2).
Gundry
Sarah
S
Blackett Laboratory, Imperial College London, Prince Consort Road, South Kensington, London SW7 2BZ, UK. sarah.gundry@imperial.ac.uk
Anscombe
Marcel P
MP
Abdulla
Abubaker M
AM
Sali
Emiliano
E
Tisch
John W G
JW
Kinsler
Paul
P
New
Geoffrey H C
GH
Marangos
Jon P
JP