Technique for generation of mixed frequency laser: A model study using LiAlH4 in FSMRCCSD linear response approach

2017-08-31T15:10:45Z (GMT) by Arijit Bag Unmesh Dutta Chowdhury
Fock space multi-reference coupled cluster (<b>FSMRCC</b>) linear response approach is used to calculate first static hyperpolarizability of the few low lying excited states of lithium aluminum hydride ( LiAlH<sub>4</sub> ) to predict its excited state nonlinear optical activity. It is observed that though<br>lithium aluminum hydride does not show strong nonlinear optical activity at its ground state, it is highly active in its low-lying excited states. Using this property of LiAlH<sub>4</sub> , a new technique is described to generate mixed frequency laser which is a laser of new kind, reported here for the first<br>time. This also helps to <b>generate a laser with shorter pulse</b> duration compare to the laser pulse duration used as incident radiation. Third order energy response properties of excited states of a closed shell molecule in analytical FSMRCC approach are also reported here for the first time.<br><br>