Measurement of the electro-optic coefficient of polymer thin films with better spatial resolution

Hou, Alin; Liu, Hongfei; Sun, Junqi; Zhang, Daming; Yi, Maobin

doi:10.1016/j.optlastec.2005.06.033

Cited by 5 publications

(4 citation statements)

References 10 publications

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“…However, if the reflectance of the semiconductor electrode is not negligible at the measurement wavelength, the electrodes system can behave as a Fabry-Perot resonator and the evaluation of the electro-optic coefficient obtained via the application of the simplified single pass model is wrong [46]. As most researchers are using indium tin oxide (ITO) as the semitransparent electrode, this means that, unless a deeper theoretical approach is used [45,[47][48][49], all the measurements obtained for wavelengths larger than about 1μm are affected by large errors due to the fact that ITO has got its plasma resonance in near-infrared and becomes reflective. Better results can be obtained in the near-infrared region by using aluminium doped zinc oxide (ZnO:Al) or, alternatively, more transparent electrodes [50,51].…”

Section: Nonlinear Ellipsometrymentioning

confidence: 99%

Fluorinated and Non-Fluorinated Electro-Optic Copolymers: Determination of the Time and Temperature Stability of the Induced Electro-Optic Coefficient

Belardini

2012

Applied Sciences

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Abstract:Organic fluorinated materials demonstrate their excellent electro-optic properties and versatility for technological applications. The partial substitution of hydrogen with fluorine in carbon-halides bounds allows the reduction of absorption losses at the telecommunication wavelengths. In these interesting compounds, the electro-optic coefficient was typically induced by a poling procedure. The magnitude and the time stability of the coefficient is an important issue to be investigated in order to compare copolymer species. Here, a review of different measurement techniques (such as nonlinear ellipsometry, second harmonic generation, temperature scanning and isothermal relaxation) was shown and applied to a variety of fluorinated and non-fluorinated electro-optic compounds.

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Section: Nonlinear Ellipsometrymentioning

confidence: 99%

Fluorinated and Non-Fluorinated Electro-Optic Copolymers: Determination of the Time and Temperature Stability of the Induced Electro-Optic Coefficient

Belardini

2012

Applied Sciences

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“…By the multiple beam interference in the asymmetry F-P cavity, the phase modulation originates from EO effect of the poled EO film is converted to the amplitude modulation. [7] A lock-in amplifier (Model 5209) is used for rectification of the voltage generated by the detector. The variable signal from the lock-in amplifier is shown on a digital oscilloscope (HP545031A).…”

Section: Measurementmentioning

confidence: 99%

Electro-optic effect of dye-doped silica thin films

et al. 2009

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Sol-gel-processed silica films doped with Disperse red 1 (DR1) as well as sol-gel-processed DR1/TiO 2 /SiO 2 films are prepared. The reaction process of sol-gel system is discussed theoretically. The optimal preparation for the dye-doped silica film is investigated as well. The content of catalyzer and the various mol ratio of raw materials in starting solution have influence on the electro-optic performance of the hybrid films. The film was spin-coated on the ITO coated glass substrate and rapidly condensed by evaporation of the solvent. Disperse red 1 (DR1) are doped in the three-dimensional silicon dioxide/titanium dioxide network possessing a high electro-optic coefficient r 33 . The EO coefficients of the poled DR1/SiO 2 films and the poled DR1/TiO 2 /SiO 2 films achieved 65 pm/V and 72 pm/V, respectively. An EO measurement system is fabricated. The hybrid films are spin coated on the low reflection mirror and corona poled after aging in order to induce the nonlinear performance. The EO output signals of the two silica films are detected. The experimental resultsshow that the EO output signals change both amplitude and frequency with the input signal. The nonlinearity of the poled DR1/SiO 2 films is relaxed less than 5% after 2000 h at 80℃. The EO coefficient of DR1/TiO 2 /SiO 2 films is relaxed less than 5% after 2500 h at 80℃ The excellent thermal stability of the hybrid organic/inorganic film has potential applications in the fields of electro-optics and optoelectronics.

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“…One strategy widely employed to obtain incorporation of azo dyes in polymer is to prepare guest-host solutions in which the dye is physically dispersed within the polymer matrix [14,[24][25][26]. However, these systems are generally considered unsuitable for applications, due to loss of alignment stability, the plasticizing effect of the guest chromophores that may lower the glass transition temperature (T g ), and the possibility of phase separation at high dye loading.…”

Section: Introductionmentioning

confidence: 99%

Covalent attachment of chromophores to chlorinated copolymers for optical waveguides: Synthesis and optical characterization

Cerruti

Borbone

Carella

et al. 2009

Polymer

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Measurement of the electro-optic coefficient of polymer thin films with better spatial resolution

Cited by 5 publications

References 10 publications

Fluorinated and Non-Fluorinated Electro-Optic Copolymers: Determination of the Time and Temperature Stability of the Induced Electro-Optic Coefficient

Fluorinated and Non-Fluorinated Electro-Optic Copolymers: Determination of the Time and Temperature Stability of the Induced Electro-Optic Coefficient

Electro-optic effect of dye-doped silica thin films

Covalent attachment of chromophores to chlorinated copolymers for optical waveguides: Synthesis and optical characterization

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