二硫化碳强场光解中可能的类EIT效应
Possible EIT-like effects in strong-field photodissociation of carbon disulphide
摘要：
CS $_2$分子在用512 nm或355 nm光的强（1-100 TW cm $^{-2}$）、35 ps脉冲照射时空间排列。当两种颜色同时出现时，空间对齐就消失了。我们类比弱场照明的原子由两种颜色，其中EIT（电磁感应透明）抑制吸收凭借偶极子不被诱导在双色场。在强场情况下，分子排列是在所施加的电场的方向上诱导的偶极的结果。因此，当不诱导偶极子时，预期不存在空间对准。
英文摘要：
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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