We report about the dual-wave optical bistable scheme realized on the base of light energy absorption by molecular gas. Switching from one state to another takes place due to optical pulse action on one of the frequencies. Under certain conditions after switching of system to the upper state, it remains in this state as much as long. That allows to realize long-time dynamic memory and various logic operations. Using of dual-wave action on molecular gas leads as well to decreasing in tens and hundreds times the intensity at which switching of system takes place.
The obtained results can find wider applications, and not only to considered object - molecular gas, since we do not use its specific properties in our report. The results can be applied, for example, to a polymer, that is more preferable to practice.