Physics – Atomic Physics
Scientific paper
2001-07-12
Physics
Atomic Physics
Submitted to Journal of Physics B
Scientific paper
10.1088/0953-4075/34/24/305
We discuss harmonic generation in the case of laser field-dressed Hamiltonians that are invariant under so-called dynamical symmetry operations. Examples for such systems are molecules which exhibit a discrete rotational symmetry of order N (e.g. benzene with N=6) interacting with a circularly polarized laser field and single atoms in a bichromatic field, with the two lasers having circular polarizations. Within a general group theory approach we study the harmonics one obtains from the interaction of a laser pulse and a circular molecule. When the system is in a pure field-dressed state the known selection rule kN \pm 1, k=1,2,3, ... results. However, other lines are observed when recombinations with states of a symmetry different from the initial one become important. This is the case for realistic laser pulses (i.e., with a finite duration). In particular when the fundamental laser frequency (or one of its multiples) is resonant with a transition between field-dressed states. Numerical ab initio simulations, confirming our analytical calculations and illustrating the power of the group theory approach, are presented.
Bauer David
Ceccherini Francesco
Cornolti Fulvio
No associations
LandOfFree
Dynamical symmetries and harmonic generation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Dynamical symmetries and harmonic generation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamical symmetries and harmonic generation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-141419