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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, second-harmonic generation from hemicyanine dye Langmuir-Blodgett multilayers has been investigated and values of second-order molecular polarizability β and its average polar angle ψ are deduced from measurements on the non-centrosymmetric films.

145 citations

Journal ArticleDOI
TL;DR: In this article, the organic salt 4-N,N-dimethylamino-4′-N′-methyl-stilbazolium tosylate, originally developed for electro-optic applications, is also a very interesting material for phase-matched parametric interactions such as frequency-doubling and optic parametric oscillation in the near infrared.
Abstract: We show that the organic salt 4-N,N-dimethylamino-4′-N′-methyl-stilbazolium tosylate, originally developed for electro-optic applications, is also a very interesting material for phase-matched parametric interactions such as frequency-doubling and optic parametric oscillation in the near infrared. These favorable properties are due to the large off-diagonal element d26 which gives measured effective phase-matchable nonlinear optical coefficients of deff=31±5 and 15±3 pm/V at the telecommunication wavelengths of λ=1313 and 1535 nm, respectively.

138 citations

Journal ArticleDOI
TL;DR: The second harmonic generation (SHG) coefficients of several corona-poled guest-host and side-chain polymers have been measured and studied over time using a new Maker Fringe analysis.
Abstract: The second harmonic generation (SHG) coefficients dij of several corona‐poled guest‐host and side‐chain polymers have been measured and studied over time using a new Maker Fringe analysis. The electro‐optic coefficient r33 and scattering losses have also been measured in thin‐film waveguides, on silicon and glass substrates, made from some of the polymers. Kleinman symmetry (d15=d31) was not valid for near‐resonant SHG in these materials and d15/d31 was determined. Stable values of d33, for a fundamental of 1.064 μm, were as high as 40 pm/V for one of the side‐chain polymers. Optical waveguide losses determined from scattering measurements were as low as 0.4 dB/cm at 1.06 μm.

130 citations

Journal ArticleDOI
TL;DR: The results of degenerate four-wave mixing studies performed on evaporated films of metal-free phthalocyanine and Langmuir-Blodgett films using sub-picosecond 602 nm pulses are reported in this article.
Abstract: The results of degenerate four‐wave mixing studies performed on evaporated films of metal‐free phthalocyanine and Langmuir–Blodgett films of a silicon phthalocyanine using subpicosecond 602 nm pulses are reported The third‐order nonlinearity of all the samples is high permitting the observation of the degenerate four‐wave mixing signal from even a monolayer In both cases, the third‐order nonlinearity has a resonant character and the observed time‐resolved phase conjugate signals provide information on the dynamics of excitons Simultaneously monitoring first‐ and second‐order diffractions from the transient gratings formed in our samples allowed us to obtain more‐detailed information on the factors influencing the temporal behavior of the nonlinear response It is concluded that the dynamics of excitons determining the nonlinearity is mainly governed by the presence of bimolecular exciton–exciton interaction Saturation behavior is observed at high light intensities

128 citations

Journal ArticleDOI
TL;DR: In this paper, a nonlinear optical crystal with point group symmetry mm2 has been grown by a temperature difference solution growth technique, and its linear and non-linear optical properties have been investigated.
Abstract: A new nonlinear optical crystal 2‐cyclooctylamino‐5‐nitropyridine (COANP) with point group symmetry mm2 has been grown by a temperature difference solution growth technique. Its linear and nonlinear optical properties have been investigated. The refractive indices na =1.702, nb =1.847, and nc =1.681 (λ=550 nm) and the nonlinear optical susceptibilities d31 and d33 (λω =1.06 μm) have been determined. Type I phase matching for Nd:YAG lasers (λ=1.06 μm) has been demonstrated for the configuration using a combination of d31 and d32 by angle tuning. A peak efficiency η=P2ω/Pω =3.6% has been observed with a 0.90‐mm‐thick crystal and a fundamental power Pω =560 W.

126 citations