Third order optical characterisation of a π-conjugated polydiacetylene by Maker fringes technique

D’Amore, F.; Zappettini, A.; Facchini, G.; Pietralunga, Silvia Maria; Martinelli, Mario; Dell’Erba, Carlo; Cuniberti, C.; Comoretto, Davide; Dellepiane, G.

doi:10.1016/s0379-6779(01)00605-1

Cited by 36 publications

(31 citation statements)

References 12 publications

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“…Moreover, the high values of molecular polarizability and hyperpolarizability lead to nonresonant nonlinear third-order susceptibility values of up to 10 À11 esu or even higher. [10] This requirement is essential in order to develop compact optical waveguides in the telecommunication wavelength regions of 1300 and 1550 nm.…”

Section: Introductionmentioning

confidence: 99%

Non‐Resonant z‐Scan Characterization of the Third‐Order Nonlinear Optical Properties of Conjugated Poly(thiophene azines)

et al. 2008

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The nonlinear optical properties of a functionalized poly(thiophene azine), namely, poly(3,4-didodecylthiophene azine), PAZ, at the optical telecommunication wavelength of 1550 nm are investigated by means of the closed-aperture z-scan technique in both thin films and solutions. Values of chi((3))=(2.4+/-0.4)x10(-13) esu, n(2)=(4.0+/-0.7)x10(-15) cm(2) W(-1), and gamma=(4.5+/-0.7)x10(-34) esu are estimated for the third-order (Kerr) susceptibility, the intensity-dependent refractive index, and the molecular second hyperpolarizability of solution samples, respectively. A very small dependence on the polymer chain length is found. Markedly higher values of (4.4+/-1.1)x10(-11) esu, (6.6+/-1.0)x10(-13) cm(2) W(-1), and (5.0+/-0.8)x10(-33) esu are measured for the corresponding quantities in thick (up to 20 mum) polymer films cast on quartz plates. The enhancement of the NLO responses on going from solution to solid samples is attributed to a partially ordered structure and to the presence of interchain interactions leading to greater pi-electron delocalization in the cast polymer films. The results are compared with those previously obtained by using third-harmonic generation (THG), taking into account that those data were measured under conditions of three-photon resonance, whereas our z-scan measurements are fully off-resonance.

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Section: Introductionmentioning

confidence: 99%

Non‐Resonant z‐Scan Characterization of the Third‐Order Nonlinear Optical Properties of Conjugated Poly(thiophene azines)

et al. 2008

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“…We therefore measured the cubic NLO coefficients (w (3) values) of the selected samples according to the THG technique. THG measurements were calibrated following the standard Maker-Fringes method [41]. Experimental single beam techniques based on THG give direct access to the complex value of the nondegenerate w ð3Þ ðÀ3o; o; o; oÞ cubic nonlinear coefficient.…”

Section: Cubic Nlo Measurementsmentioning

confidence: 99%

“…By measuring the MakerFringes patterns of our samples, the modulus of the nonlinear coefficient can be extracted, once the nonlinear coefficient of the substrate and the linear optical constants are known. For this reason fused silica glass was chosen as NLO reference and substrate material, since its optical constants are well known and its nonlinear coefficients have been determined with high accuracy for the wavelength used in the present experiments [12,[41][42][43]. All studied film samples were prepared with a PDA concentration greater than 95% w/w whose optical parameters were also well known.…”

Section: Cubic Nlo Measurementsmentioning

confidence: 99%

“…All studied film samples were prepared with a PDA concentration greater than 95% w/w whose optical parameters were also well known. In principle, both the film and the substrate contribute to the detected THG signal (the focal length of the focusing lens used was less than 50 mm in order to make the air contribution to the THG signal negligible [41,42]; the two contributions must be separately identified. Moreover, since the film was deposited only on one side of the substrate, the experimental configuration was asymmetric from a geometrical point of view and different relations have been developed in order to fit the 'front' configuration where the fundamental beam enters the film first, or the 'back' configuration, where the films lies behind the substrate.…”

Section: Cubic Nlo Measurementsmentioning

confidence: 99%

“…Due to the resonant conditions of our experiment, where the free wave was considerably absorbed by the orange PDA-PHDAz+GdCl 3 sample (see Fig. 2), the determination of w (3) may be approximated for film samples under resonant (absorption) conditions by the following expression [41,47]:…”

Section: Article In Pressmentioning

confidence: 99%

See 2 more Smart Citations

Effect of metal salts in the optical properties of polydiacetylenes

Díaz-Ponce

Morales–Saavedra

Beristaín-Manterola

et al. 2008

Journal of Luminescence

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Structural, morphological, optical, and nonlinear optical properties of fluorine‐doped zinc oxide thin films deposited on glass substrates by the chemical spray technique

Castañeda

Morales–Saavedra

Acosta

et al. 2006

Physica Status Solidi (a)

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Fluorine‐doped zinc oxide thin films (ZnO:F) were deposited on sodocalcic glass substrates from an aged solution using a chemical spray technique. The effect of substrate temperature (T S) on the morphological, optical, and nonlinear optical (NLO) properties of the ZnO:F thin films was studied. These films were analysed using X‐ray diffraction, scanning electron microscopy, profilometry, optical transmittance, optical fluorescence, and second (SHG) and third harmonic generation (THG) techniques. A polycrystalline structure with a preferential growth along the ZnO(002) plane was found in all cases, with a corresponding average crystal size of less than 32 nm for the films. The morphology of the surfaces and some optical properties were found to be dependent on T S. The films deposited at low T S (400 °C) showed a uniform surface covered with needle‐like grains as well as SHG and THG response. In contrast, for the films deposited at 525 °C, a porous surface with irregular‐shaped grains was obtained and a substantial reduction of the SHG and THG response was detected. NLO χ (2)eff coefficients one order of magnitude larger than the χ (2)11 component of an α‐quartz reference crystal were measured for all ZnO:F thin films. The χ (3) values of the samples, under resonant conditions, were in the interesting range of 10–12 esu. Finally, a typical optical transmittance higher than 85% and a band gap (E g) of 3.4 eV were evaluated for films deposited under optimal conditions. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Third order optical characterisation of a π-conjugated polydiacetylene by Maker fringes technique

Cited by 36 publications

References 12 publications

Non‐Resonant z‐Scan Characterization of the Third‐Order Nonlinear Optical Properties of Conjugated Poly(thiophene azines)

Non‐Resonant z‐Scan Characterization of the Third‐Order Nonlinear Optical Properties of Conjugated Poly(thiophene azines)

Effect of metal salts in the optical properties of polydiacetylenes

Structural, morphological, optical, and nonlinear optical properties of fluorine‐doped zinc oxide thin films deposited on glass substrates by the chemical spray technique

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