Current laser technology allows for the preparation of short, intense laser pulses with controllable amplitude and phase. The general definition of the phase includes variation of frequency, leading thus of the concept of chirped pulses. We have previously shown that chirped IR pulses can be uses to efficiently dissociate polar (ionic) chemical bonds by varying IR frequencies continuously in tune with the anharmonic vibrational frequencies of a chemical bond [1]. We have recently extended this idea to Raman processes [2-3]. Thus using the dressed state representation of photon-molecule states [4], it can be shown that Chirped Adiabatic Raman Passage, CARP, can be used to completely invert high vibrational number populations by using variable frequency pump and dump pulses.
展开▼
