Nonlinear optical properties of organic and polymeric materials
29 Sep 1983-
About: The article was published on 1983-09-29 and is currently open access. It has received 762 citations till now.
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01 Jan 1985
TL;DR: In this article, large values of α,β and γ (respectively the polarizability, first and second-order hyperpolarizability tensors) which corresoond to higher linear and/or nonlinear responses of a medium, are associated with the existence of conjugated π-systems.
Abstract: Some of the future applications in optical communication systems probably be based on the large second- and third-order nonlinear optical resoonses observed in several organic molecules and polymers[1]. In these compounds, large values of α,β and γ (respectively the polarizability, first and second-order hyperpolarizability tensors) which corresoond to higher linear and/or nonlinear responses of a medium, are found associated with the existence of conjugated π-systems. Finding the structural and constitutive attributes of the most responsive compounds, e.g. by quantum mechanical calculations, is in itself a research of fundamental and applied interest.
4 citations
TL;DR: In this paper, polycrystalline thin films (1 −10 μm) of the nonlinear material 2 −methyl−4−nitroaniline were deposited on Ag, Cu, and Si by conventional and partially ionized beam deposition.
Abstract: Polycrystalline thin films (1–10 μm) of the nonlinear material 2‐methyl‐4‐nitroaniline were deposited on Ag, Cu, and Si by conventional and partially ionized beam deposition. The use of ions was seen to promote a highly oriented film, with only the single x‐ray diffraction orientation (112) being observed at reduced temperatures (−50 °C). The effect of the ions on the physical microstructure of the films was to densify the film and reduce the size of the microcrystals. The films had powderlike optical properties and displayed a strong second harmonic from a Nd:YAG laser.
4 citations
TL;DR: There are two approaches to the development of new functional materials (polymers): one is to design and synthesize novel compounds (chemical approach) and the other is to control molecular assemblies (physical approach).
Abstract: There are two approaches to the development of new functional materials (polymers): one is to design and synthesize novel compounds (chemical approach) and the other is to control molecular assemblies (physical approach). The second approach involves control of higher order structures (conformation) such as crystalline and/or amorphous states, helix and/or random coil structures, superstructures and so forth.
4 citations
Dissertation•
30 Apr 2002
TL;DR: In this article, a self-assembly process was used to fabricate several polymers known to have non-linear optical behavior and their properties were measured with interferometry and their electro-optic coefficients determined to be on the order of that of LiNbO 3.
Abstract: Electrostatic self-assembly was used to fabricate several samples of polymers known to have non-linear optical behavior. These sample's characteristics were measured with interferometry and their electro-optic coefficients determined to be on the order of that of LiNbO 3. The self-assembled samples are shown to have an enhanced polar order compared to that of more traditional poled polymers. Furthermore, this polar order is intrinsic and thus doesn't require electric field poling and does not decay with time. The self-assembly process is therefore shown to possess great potential for the fabrication of high-speed electro-optic modulators for commercial and military applications. iii Acknowledgments I would like to acknowledge many meaningful discussions with colleagues Dr. and for contributing to my professional development. It has been both an honor and a privilege. In addition, thanks to all of the FEORC researchers and support staff for creating an environment that made the performance of this research fun.
4 citations
TL;DR: In this paper, two thiophene derivatives (TH-17 and TH-19) were synthesized and the ultra-fast nonlinear optical (NLO) performance was investigated using z-scan technique.
4 citations