Transmission, reflection, and trapping of collimated light beams in diffusive Kerr-like nonlinear media

Amplitude Modulation and Demodulation in Strain Dependent Diffusive Semiconductors

“…A direct dependence of the ratio of amplitudes on pump frequency ω 0 and the acoustic intensity u is observable from Eq. (14). However, in the vicinity of the wave number range k a = 2k, authors find a singularity in the field ratio.…”

“…III-V compound semiconductors, in which carriers can easily be moved. Therefore, the inclusion of carrier diffusion in theoretical studies of modulational phenomenon seems to be important from both the fundamental and application points of view and thus attracted attention of many workers in the last couple of decades [11][12][13][14]. Motivated by the above discussion, in this paper, we have presented the electrostrictive amplitude modulation of an intense electromagnetic beam in a strain dependent diffusive semiconductor crystal.…”

Nonlinear interfaces: intrinsically nonparaxial regimes and effects

“…The first studies of nonlinear interfaces are dated between the late 70's and the early 80's and were restricted to Gaussian beams at the boundary between a linear and a nonlinear (Kerr-type) medium [1,2,3,4]. In the transition from the 80's to the 90's, a second approach focused on interfaces between two Kerr-type nonlinear media [5,6,7,8,9,10]. The particlelike model [6,7,8,9] was then introduced, where a soliton is represented as a quasiparticle which evolves according a potential defined by the nature of the nonlinear interface.…”

“…In the transition from the 80's to the 90's, a second approach focused on interfaces between two Kerr-type nonlinear media [5,6,7,8,9,10]. The particlelike model [6,7,8,9] was then introduced, where a soliton is represented as a quasiparticle which evolves according a potential defined by the nature of the nonlinear interface. Soliton characteristics, such as transverse velocity and amplitude, were related to interface parameters to establish criteria for soliton evolution at the interface.…”

Helmholtz solitons in diffusive Kerr-type media

“…48 The second restriction involved in the NLS equation, 49 however, is essentially an angular limitation which is removed 50 provided the SVEA is not assumed in the two-dimensional 51 (2D) scalar Helmholtz equation [32]. Described by a scalar 52 model, this type of nonparaxiality deals with broad beams 53 * julsan@tel.uva.es propagating at arbitrary angles and it has been developed 54 in the framework of the Helmholtz theory [33,34], where, 55 for local media, essential corrections to previous paraxial 56 studies have been revealed [35][36][37][38][39]. As regards nonlocal 57 media, longitudinal nonlocal effects have been considered in 58 liquid crystals [40] and, more recently, in thermal media [41].…”