Electro-optic effects in two tolane side-chain nonlinear-optical polymers: comparison between measured coefficients and second-harmonic generation

Morichere, D.; Chollet, Pierre-Alain; Fleming, William W.; Jurich, M.; Smith, Barton A.; Swalen, J. D.

doi:10.1364/josab.10.001894

Cited by 33 publications

(16 citation statements)

References 10 publications

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“…In fact, the second harmonic wavelength of λ = 532 nm used for the optical measurements, generated from a laser beam with a fundamental output at λ = 1064 nm, is localized at the beginning of the polymer absorption band, as shown in Figure 2 by the absorption spectra of polymer thin films. Although a correction of such values is possible according to a two‐level model,36, 37 this lies outside the aim of this work, and no extrapolation has been made. In fact, in this study the NLO measurements have been mainly used to detect the optical polymer activity, to measure its stability with time, and to make an internal comparison between the optical properties of the polymers.…”

Section: Resultsmentioning

confidence: 99%

New polyurethanes and polyesters for second‐order nonlinear optical applications

Casalboni

Caruso

Maria

et al. 2004

J. Polym. Sci. A Polym. Chem.

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New polymers for second‐order nonlinear optical (NLO) applications were synthesized and characterized. They were distinguished by the presence of chromophore groups, with various molecular hyperpolarizability values, used as pendants on substantially rigid backbones. The polymers were prepared through the reaction of tolylene‐2,4‐diisocyanate, or a suitable alkyloxyphthaloyl dichloride, with the N,N‐diethanol‐4‐(phenyl) group azo‐linked to a nitrofluorenone, nitrostilbene, nitrooxadiazole, or nitrothiadiazole moiety. The polymers exhibited good thermal stability, high glass‐transition temperatures, and an absence of crystallinity. The second‐order NLO properties of thin, transparent poled films, prepared by spin coating and thermal corona poling, were investigated for some of the polymers. The second harmonic coefficients, ranging between 18 and 25 pm/V, depended more on the alignment of the chromophore groups along the direction of the poling field than on their molecular hyperpolarizability. The temporal stability of the NLO properties of the polymers was also investigated. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 3013–3022, 2004

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Section: Resultsmentioning

confidence: 99%

New polyurethanes and polyesters for second‐order nonlinear optical applications

Casalboni

Caruso

Maria

et al. 2004

J. Polym. Sci. A Polym. Chem.

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“…ROM et al [133] further modified the technique in order to incorporate the measurement of the quadratic EO or Kerr effect, by applying a dc bias field in addition to the ac field. Morichere and coworkers [134] showed furthermore that angle-dependent measurements are necessary if the internal absorption in the film is not negligible. In transmission geometry, the large errors from interference effects that are present in the standard reflection geometry can be avoided, as demonstrated by Lundquist et al [135].…”

Section: Teng and Man Introduced An Ellipsometric Setup [1301 Schemamentioning

confidence: 99%

Nonlinear optical polymer electrets current practice

Bauer‐Gogonea

Gerhard²

1996

IEEE Trans. Dielect. Electr. Insul.

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Amorphous polymers with strong second-order optical nonlinearities contain molecular chromophore dipoles as guest molecules, as side groups, or as main-chain segments. In order to break the inherent centrosymmetry of the initially isotropic dipole orientation in these materials and to render them nonlinear optically active (as well as piezo- and pyroelectric), preferential dipole alignment by means of electrical poling is necessary. After poling the nonlinear optical polymer films are molecular dipole electrets so that the full range of techniques for the preparation and investigation of polar electrets may be employed, together with nonlinear optical techniques, originally developed for the investigation of ferroelectric polymers, such as poly(vinylidene fluoride). The field of nonlinear optical polymers developed from very enthusiastic beginnings in the early eighties to the present and more realistic approach, with real applications just about to appear

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“…The common techniques employed to fabricate EO polymer devices and structures involve spin coating of a EO polymer layer and vacuum deposition of metal electrodes [8,12,13]. In order to realize second-order nonlinear effects, the EO polymer must then be poled.…”

Section: Liftoff Deposition Of Eo Polymer Filmmentioning

confidence: 99%

Development of Highly Active Electro-Optic Polymers for In-Line Fiber Photonic Devices

Hill¹

1998

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Electro-optic effects in two tolane side-chain nonlinear-optical polymers: comparison between measured coefficients and second-harmonic generation

Cited by 33 publications

References 10 publications

New polyurethanes and polyesters for second‐order nonlinear optical applications

New polyurethanes and polyesters for second‐order nonlinear optical applications

Nonlinear optical polymer electrets current practice

Development of Highly Active Electro-Optic Polymers for In-Line Fiber Photonic Devices

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