LASER CONTROL OF ULTRAFAST STATE-SELECTIVE PREPARATION OF OH AT HIGH VIBRATIONAL LEVELS

An efficient laser control scheme for ultrafast state-selective prepar ation of vibrationally excited molecules close to the dissociation thr eshold with ultrashort infrared laser pulses has been developed and de monstrated by means of computer simulations for a one-dimensional diss ociative model of OH in the electronic ground state. The control schem e for OH may include up to four laser pulses with properly optimized a mplitudes, carrier frequencies, and overlaps. Simulations of the quant um dynamics in the classical laser field show that any prescribed high vibrational level of OH can be populated with selectivity close to 10 0%.