Reflection of beams from a nonlinear medium

Excitation of surface wave beams at the interface between linear and nonlinear media

“…In relation to the mentioned complexity of behavior of even two-dimensional beams (see [3][4][5][6][7]) at the interface between linear and nonlinear media, which was confirmed in this paper for three-dimensional beams with nonoptimal parameters, experimental measurements of the nonlinear GoosHänchen effect were performed earlier (see, e.g., [21]) in the absence of NSW excitation, i.e., at the boundary of a medium with defocusing nonlinearity. For experimental verification of the behavior of the light beams at the interface between a linear and a nonlinear medium with Kerr's nonlinearity in the optical range (E 0 ∼ 10 6 CGSE), one needs laser beams with powers of units to tens of kW.…”

“…Additional features of the beam evolution were found to exist at the interfaces of the media [3][4][5][6][7]. In particular, in [8,9] the possibility of trapping the incident and grazing beams of TE-polarized waves into nonlinear surface waves (NSWs) [10][11][12], which were considered promising objects for solving some problems of spectroscopy of surfaces of nonlinear media [13] was established.…”

Theory of Plane Wave Reflection and Refraction by the Nonlinear Interface

“…7. This theorem related the existence of different kinds of travelling waves with t4e behavior of a "characteristic" nonlinear function F(u) (12). The main conclusion of the theorem is that the existence of LITW in a transparent medium is possible if, and only if: 1) there exists a range V 3 u where F(u) > 0; 2) F(u) falls at least somewhere in V (i.e., there is at least one interval W c V where F(u) falls monotonically); and 3) if these conditions are satisfied, the LITW, if excited, can have a value of Uoo which must belong only to this falling interval, i.e.…”