  Efficient and long-lived field-free molecular orientation is achieved using
only two kicks appropriately delayed in time. The understanding of the
mechanism rests upon a molecular target state providing the best efficiency
versus persistence compromise. An optimal control scheme is referred to for
fixing the free parameters (amplitudes and the time delay between them). The
limited number of kicks, the robustness and the transposability to different
molecular systems advocate in favor of the process, when considering its
experimental feasibility.
