Time Delay in Thin Dielectric Slabs with Saturable Nonlinearity
P.P. Beličeva, I. Ilića, J. Radovanovićb, V. Milanovićb and Lj. Hadžievskia
a Vinca Institute of Nuclear Sciences, Atomic Physics Laboratory, Mike Petrovića Alasa 12-14, P.O. Box 522, 11001 Belgrade, Serbia
b Faculty of Electrical Engineering, Bulevar kralja Aleksandra 73, 11120 Belgrade, Serbia
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Time delays for an intense transverse electric wave propagating through a slab with saturable nonlinearity are investigated. The nonlinearity is assumed in a form of the Vinetskii-Kukhtarev model, which is relevant for the slabs made of nonlinear photorefractive crystals, such as GaAs and LiNbO3, which feature a saturable nonlinearity. The expressions for the group delay and the dwell time are derived and the relation between them is studied. It is shown that the difference between them has three different contributions. The first one corresponds to the self-interference associated with the dispersion of the medium surrounding the slab. The other two appear due to the nonlinearity of the slab and oblique incidence of the transverse electric wave. All the results are compared with the case of dielectric slabs with cubic (Kerr) nonlinearity.
DOI: 10.12693/APhysPolA.115.834
PACS numbers: 03.65.Xp, 41.20.Jb, 42.25.Bs, 42.70.Nq