Filters

20132

More filters

20202
Reset filters

Settings

search.filters.applied.f.access: openAccess × Start date: 1999 × Version: publishedVersion × Publisher: Bristol : IOP × Subject: Atoms × WGL Institute: MBI ×

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    The role of the Kramers-Henneberger atom in the higher-order Kerr effect
    (Bristol : IOP, 2013) Richter, M.; Patchkovskii, S.; Morales, F.; Smirnova, O.; Ivanov, M.
    We discuss the connection between strong-field ionization, saturation of the Kerr response and the formation of the Kramers-Henneberger (KH) atom and long-living excitations in intense infrared (IR) external fields. We present a generalized model for the intensity-dependent response of atoms in strong IR laser fields, describing deviations in the nonlinear response at the frequency of the driving field from the standard model. We show that shaping the driving laser pulse allows one to reveal signatures of the excited KH states in the Kerr response of an individual atom.
  • Thumbnail Image
    Item
    Photon transport in one-dimensional systems coupled to three-level quantum impurities
    (Bristol : IOP, 2013) Martens, C.; Longo, P.; Busch, K.
    We discuss the transport properties of a single photon in a one-dimensional waveguide with an embedded three-level atom and utilize both stationary plane-wave solutions and time-dependent transport calculations to investigate the interaction of a photon with driven and undriven V- and Λ-systems. Specifically, for the case of an undriven V-system, we analyze the phenomenon of long-time occupation of the upper atomic levels in conjunction with almost dark states. For the undriven Λ-system, we find non-stationary dark states and we explain how the photon's transmittance can be controlled by an initial phase difference between the energetically lower-lying atomic states. With regard to the driven three-level systems, we discuss electromagnetically induced transparency in terms of the pulse propagation of a single photon through a Λ-type atom. In addition, we demonstrate how a driven V-type atom can be utilized to control the momentum distribution of the scattered photon.