Second-order nonlinear optical thin films fabricated from ionically self-assembled monolayers

James Randy Heflin; Yanjing Liu; Charles Figura; Daniela Marciu; Richard O. Claus

doi:10.1117/12.284253

13 October 1997 Second-order nonlinear optical thin films fabricated from ionically self-assembled monolayers

James Randy Heflin, Yanjing Liu, Charles Figura, Daniela Marciu, Richard O. Claus

Proceedings Volume 3147, Nonlinear Optical Properties of Organic Materials X; (1997) https://doi.org/10.1117/12.284253
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

We demonstrate, for the first time, that a new ionically self-assembled monolayer (ISAM) technique for thin film deposition can be employed to fabricate materials possessing the noncentrosymmetry that is requisite for a second order, nonlinear optical response. Using two different commercially-available polyelectrolytes, we have produced ISAM nonlinear optical thin films with values comparable to that of quartz. As a result of the ionic attraction between successive layers, the ISAM films self-assemble into a noncentrosymmetric structure that has exhibited no measureable decay of at room temperature over a period of more than four months. The x2 of ISAM films has been examined by second harmonic generation using a fundamental wavelength of 1200 nm. The second harmonic intensity of the films exhibits the expected quadratic dependences on fundamental intensity and film thickness while the polarization dependence is consistent with orientation of the chromophore dipole moment perpendicular to the substrate.

Citation Download Citation

James Randy Heflin, Yanjing Liu, Charles Figura, Daniela Marciu, and Richard O. Claus "Second-order nonlinear optical thin films fabricated from ionically self-assembled monolayers", Proc. SPIE 3147, Nonlinear Optical Properties of Organic Materials X, (13 October 1997); https://doi.org/10.1117/12.284253

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