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MonographDOI

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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Journal ArticleDOI
TL;DR: In this article, the synthesis, crystal structure, electronic and second-order nonlinear optical properties of a new bis(salicylaldiminato)nickel(II) Schiff-base complex are reported.
Abstract: The synthesis, crystal structure, electronic and second-order nonlinear optical (NLO) properties of a new bis(salicylaldiminato)nickel(II) Schiff-base complex are reported. The compound crystallizes in the space group P1. The NLO properties are investigated by electric field induced second harmonic (EFISH) and by INDO/SCI-SOS calculation. This compound obtained by condensation of 4-(diethylamino)salicylaldehyde and 1,2-diamino-4,5-dinitrobenzene in the presence of nickel(II) chloride exhibits the largest second-order NLO response reported for this family of bis(salicylaldiminato)nickel(II) metal complexes, with a β × μ value of 1530 × 10-48 cm5 esu-1. In addition, a thermal stability up to 300 °C, indicates potential uses of metal−salen derivatives in poled polymers matrix with high Tg.

69 citations

Journal ArticleDOI
TL;DR: In this article, a single-mode linear channel waveguide array with device packaging density of 1250 channels cm-1 has been achieved, and the first 12-channel wavelength division demultiplexer working at 830, 840, 850, 860, 870, 880, 890, 900, 910, 920, 930 and 940 nm on a GaAs substrate is described.
Abstract: A myriad of passive and active guided-wave devices has been successfully demonstrated using the photolime gel polymer. These include high density linear and curved channel waveguide arrays, electro-optic modulator and modulator arrays, highly multiplexed waveguide holograms for wavelength division demultiplexing and optical interconnects, waveguide lens, and rare-earth ion-doped polymer waveguide amplifiers. A single-mode linear channel waveguide array with device packaging density of 1250 channels cm-1 has been achieved. The first 12-channel wavelength division demultiplexer working at 830, 840, 850, 860, 870, 880, 890, 900, 910, 920, 930 and 940 nm on a GaAs substrate is also described in this paper. A polymer-based electro-optic travelling wave modulator with 40 GHz electrical bandwidth is further delineated. A rare-earth ion-doped polymer waveguide amplifier working at 1.06 μm with 8.5 dB optical gain is also achieved using this polymer matrix. The tunability of the waveguide refractive index of photolime gel polymer allows the formation of a graded index (GRIN) layer. As a result, these active and passive guided wave devices can be realized on any substrate of interest. High quality waveguides (loss<0.1 dB cm-1) have been made on glass, LiNbO3, fused silica, quartz, PC board, GaAs, Si, Al, Cu, Cr, Au, Kovar, BeO, Al2O3 and AIN.

67 citations

Journal ArticleDOI
TL;DR: In this article, six N-substituted derivatives of 2-methyl-4-nitroaniline (MNA) and two Nsubstitized derivatives of 4-nitroniline were synthesized and their physical and optical properties were examined in the search for nonlinear optical materials with a sufficiently large second harmonic (SH) activity and applicability to practical use.
Abstract: Six N-substituted derivatives of 2-methyl-4-nitroaniline (MNA) and two N-substituted derivatives of 4-nitroaniline were synthesized and their physical and optical properties were examined in the search for nonlinear optical materials with a sufficiently large second harmonic (SH) activity and applicability to practical use. Some derivatives produced single crystals and their structures were determined by X-ray crystallography. The trends of the SH intensity of these materials could be qualitatively explained based on the b tensor (the effective molecular hyperpolarizability in the crystal). Amongst the derivatives examined in this investigation, N-benzyl-MNA showed the highest SH activity (up to twice that of MNA), thermostability and phase-matching ability.

67 citations

Journal ArticleDOI
TL;DR: In this article, the vector (observable) part of the hyperpolarizability tensor for frequency doubling, β vec ( -2ω; ω, ω), is calculated using perturbation theory and the PPP model Hamiltonian.

66 citations

Journal ArticleDOI
TL;DR: In this paper, a new class of chiral conjugated materials, called "propeller" polymers, have been designed and synthesized by using the transition metal catalyzed cross-coupling reactions including the coupling of terminal alkynes with aryl halides and the Suzuki reaction.
Abstract: A new class of chiral conjugated materials, “propeller” polymers, have been designed and synthesized. By using the transition metal catalyzed cross-coupling reactions including the coupling of terminal alkynes with aryl halides and the Suzuki reaction, chiral binaphthyl monomers are reacted with o-phenylene and m-phenylene halides to construct the “propeller” polymers. Due to the chirality of the binaphthyl units and the rigidity of the conjugated system, the dipole units in these novel materials are expected to form a novel propeller-like three-dimensional configuration. Molecular weights of these polymers are analyzed by gel permeation chromatography and laser light scattering. The structures of these polymers are studied by using NMR, UV, IR, CD, and fluorescence spectroscopic methods. The repeat units of these materials are synthesized which provide further evidence for the structure of the polymers. The thermal properties of these polymers are studied by using thermal gravimetric analysis as well as ...

66 citations