吸收跃迁 iO Pmk(t) mk ica mk zt sin [)t/21 n[(-omk)/2]2 2m|A[n-(5+h)吸收跃迁 ( ) [ ( )] 2 [( )/ 2] sin [( ) / 2] ( ) 1 1 ( ) 2 2 2 2 2 2 ( ) →   − + − − = − − =  − t F t t F t t i e F i P t m k m k m k m k m k m k i t m k m k m k m k                     