Possible EIT-like effects in strong-field photodissociation of carbon disulphide

Details Possible EIT-like effects in strong-field photodissociation of carbon disulphide Possible EIT-like effects in strong-field photodissociation of carbon disulphide

2007-02-26

arxiv.org/abs/physics/0702227v1

Physics

Atomic Physics

To appear in Chemical Physics Letters

Scientific paper

CS$_2$ molecules are spatially aligned upon irradiation by intense (1-100 TW cm$^{-2}$), 35 ps pulses of 512 nm or 355 nm light. When both colours are simultaneously present, spatial alignment disappears. We draw analogy with weak-field illumination of an atom by two colours wherein EIT (electromagnetically induced transparency) inhibits absorption by virtue of dipoles not being induced in two-colour fields. In the strong field scenario, molecular alignment is a consequence of a dipole being induced in the direction of the applied electric field. It follows, therefore, that when dipoles are not induced, no spatial alignment is to be expected.

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