R Mountasser et al 2002 J. Opt. A: Pure Appl. Opt. 4 303 doi:10.1088/1464-4258/4/3/315
R Mountasser1, M Ayadi2, E Lantz3 and H Maillotte3,4
Show affiliationsOptical transmission, near the critical angle of incidence, through a nonlinear thin layer sandwiched between two linear glass blocks is studied. The transmissivity of the layer in the near-resonant regime is very sensitive to the intensity-induced change of its refractive index. Using this property, we propose a method to determine the nonlinear refractive index n2 of thin films, on the basis of a simple plane-wave model. Experimental results in the picosecond range, using CS2 standard as the nonlinear layer, show the high sensitivity of the method.
42.65.An Optical susceptibility, hyperpolarizability
42.65.Pc Optical bistability, multistability, and switching, including local field effects
42.65.Hw Phase conjugation; photorefractive and Kerr effects
Issue 3 (May 2002)
Received 19 November 2001, in final form 7 March 2002
Published 28 March 2002
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