Iam-Choon Khoo

TL;DR: A review of the basic mechanisms of optically induced refractive index modification in liquid crystalline materials is presented in this paper, where the use of methyl-red dye or an azobenzene liquid crystal will dramatically enhance the nonlinear optical responses of typical nematic liquid crystals (NLC).

TL;DR: In this paper, the results of wavefront conjugation experiments in nematic liquid crystal films using low-power CW laser beams are reported and the dependences of the efficiency on the film thickness and other parameters are discussed.

TL;DR: The superposition with the self-transparency effect produces a threshold in the observed wave-mixing phenomenon and is reported to be the first observation of nonlinear light diffraction in polymer-dispersed liquid crystals.

TL;DR: In this article, the authors present a theoretical analysis and experimental demonstration of optically self-activated polarization switching process in a 90° twist alignment dye-doped nematic liquid crystal, and demonstrate the feasibility of designing efficient low threshold polarization and fast switching and optical limiting devices for cw and microsecond lasers.

TL;DR: In this article, a nonlinear organic fiber core liquid L34 is analyzed with a model that accounts for linear, two-photon, intermediate and excited-state absorptions of picosecond and nanosecond laser pulses through ILC cored fibers and bulk films.