Nonlinear resonance absorption in laser-cluster interaction
arXiv:physics/0512249 · doi:10.1103/PhysRevLett.96.123401
Abstract
Rare gas or metal clusters are known to absorb laser energy very efficiently. Upon cluster expansion the Mie plasma frequency may become equal to the laser frequency. This linear resonance has been well studied both experimentally and theoretically employing pump probe schemes. In this work we focus on the few-cycle regime or the early stage of the cluster dynamics where linear resonance is not met but nevertheless efficient absorption of laser energy persists. By retrieving time-dependent oscillator frequencies from particle-in-cell simulation results, we show that nonlinear resonance is the dominant mechanism behind outer ionization and energy absorption in near infrared laser-driven clusters.
4 pages, 4 figures, REVTeX, minor modifications according to referee comments, accepted for publication in Phys. Rev. Lett
References in corpus (5)
- Ionization of clusters in intense laser pulses through collective electron dynamics
- Small rare gas clusters in soft X-ray pulses
- Asymmetric emission of high energy electrons in the two-dimensional hydrodynamic expansion of large xenon clusters irradiated by intense laser fields
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- Collisionless energy absorption in the short-pulse intense laser-cluster interaction
- Optimizing the ionization and energy absorption of laser-irradiated clusters
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- Anharmonic resonance absorption of short laser pulses in clusters: A molecular dynamics simulation study
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