Femtosecond photon echo in dye-doped polymer film at liquid nitrogen temperature
S V Konturov, Vladimir S. Lobkov, К. М. Салихов +3 more
The first observation is reported of the primary femtosecond photon echo at a liquid nitrogen temperature in a dye-doped polymer film at a wavelength of 780 nm. Echo signals were generated by pulses with the duration of 130 fs. The echo signal decay can not be described by a simple exponential function. There is a fast decay region below 250-300 fs and a slow decay region at longer time intervals. There were also detected signals of the self-diffraction of exciting pulses on a nonequilibrium population difference grating, induced in resonant medium by these pulses.
Laser Physics Letters•Oct 7, 2004•12 citations