Abstract
Ab-initio study on the quantum interference of two vibrational wavepackets on A1Σ+ state of NaH molecule excited by two delayed phase-locked 4 femtosecond pulses (pump and control) has revealed that coherent control over populating selective vibrational levels or selective product state can be achieved. We have investigated here how the quantum interference of two wavepackets can be controlled to design a wavepacket which resembles one or two vibrational levels on the excited bound state leading to large overlap with these vibrational levels and hence enhancing the cross section of excitation to selected vibrational levels wiping out the population flow to other nearby levels covered by the bandwidth of the pulses. It will be shown here that the designing of interfering wavepacket can be controlled by controlling the pulse duration and carrier frequency of two delayed phase-locked ultrashort pulses.
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