Orientational relaxation of three different dendrimers in polycarbonate matrix investigated by optical poling

Seniutinas, Gediminas; Laipniece, Lauma; Kreicberga, Jana; Kampars, Valdis; Gražulevičius, J.V.; Petruškevičius, Raimondas; Tomašiūnas, R.

doi:10.1088/1464-4258/11/3/034003

Cited by 15 publications

(9 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was assumed that before all-optical poling process the all azo-dye molecules are in the trans isomer state and oriented isotropically. were defined in [10] for polyester type dendrimer G1 in polycarbonate polymer matrix. The value for quantum efficiency of trans-to-cis photoisomerization 0.11 ξ = was used from [8].…”

Section: Resultsmentioning

confidence: 99%

Photoinduced molecular polar alignment in E-O polymers by all-optical poling holographic methods

Petruškevičius¹,

Kucinskaite²,

Navickaitė

et al. 2010

2010 12th International Conference on Transparent Optical Networks

View full text Add to dashboard Cite

A phenomenological model of photoinduced poling dynamics is developed on the basis of the experimental results. Given the intensities of the fundamental field and the second harmonic field used in the poling process, generation and relaxation of (2) and (3) nonlinear susceptibilities are described by this model. The cis and trans orientational order parameters up to the fourth order are used in the calculations. The fact that the laser used in experiments operates in pulses, rather than a continuous wave mode, is also taken into account in this model. The model could eventually be used to determine the optimal intensities of poling fields for efficient generation of nonlinear optical structures. We present results on all-optical poling kinetics of electro-optic active polyester type dendrimers G1 photo-patterned in the polycarbonate matrix.

show abstract

Section: Resultsmentioning

confidence: 99%

Photoinduced molecular polar alignment in E-O polymers by all-optical poling holographic methods

Petruškevičius¹,

Kucinskaite²,

Navickaitė

et al. 2010

2010 12th International Conference on Transparent Optical Networks

View full text Add to dashboard Cite

show abstract

“…This induced molecular orientation breaks the initial centrosymmetry of the structure inside the material, creating a quasi-phase-matched grating of nonlinear second order susceptibility, suitable for second harmonic generation. We used a two-branch type experimental setup [9]. The light source was a Nd:YAG laser operating at a wavelength of 1064 nm.…”

Section: Samples and Experimentalmentioning

confidence: 99%

Photo-Switching dynamics of azo-phenylcarbazoles in polycarbonate around β transition temperature

Seniutinas

Balčytis

Tomašiūnas

et al. 2014

2014 16th International Conference on Transparent Optical Networks (ICTON)

View full text Add to dashboard Cite

Second order non-linear optical features of azophenylcarbazole based derivative 9-(2,3-epoxy)propyl-2-(2,3-epoxy)propoxy-3-(4-nitrophenyl)azo-9H-carbazole in polycarbonate investigated at temperature 240 K, which is close to β transition for polycarβonate, are presented. Using all-optical poling technique writing and reading kinetics of second order susceptibility gratings in the azophenylcarbazole derivative were measured. Theoretical modelling of the experimental results indicates two cis-trans thermoisomerization rates in the range of k 1 = (2.5 -3.3)×10 -3 s -1 , k 2 = (6.3 -7.14)×10 -4 s -1 depending on writing laser beam intensities (I ω = 0.75 -1.43 J/cm 2 , I 2ω = 0.5 -0.96 mJ/cm 2 ); with slightly lower rates for the lower writing beam fluence. The orientational diffusion rate 1.43·10 -5 s -1 does not depend on the writing conditions. The result indicates that the range of writing conditions used has very minor or even no influence over the intermolecular interaction observed during the all-optical poling process.

show abstract

“…This induced molecular orientation breaks the initial centrosymmetry of the structure inside the material creating a quasi-phase-matched grating of nonlinear second order susceptibility applicable to the second harmonic generation. We used a twobranch type of experimental setup [6]. The light source was a Nd:YAG laser operating at wavelength 1064 nm.…”

Section: Samples and Experimentalmentioning

confidence: 99%

Picosecond reading of optically poled azophenylcarbazole

Navickaitė

Seniutinas

Tomašiūnas

et al. 2011

2011 13th International Conference on Transparent Optical Networks

View full text Add to dashboard Cite

show abstract

Orientational relaxation of three different dendrimers in polycarbonate matrix investigated by optical poling

Cited by 15 publications

References 18 publications

Photoinduced molecular polar alignment in E-O polymers by all-optical poling holographic methods

Photoinduced molecular polar alignment in E-O polymers by all-optical poling holographic methods

Photo-Switching dynamics of azo-phenylcarbazoles in polycarbonate around β transition temperature

Picosecond reading of optically poled azophenylcarbazole

Contact Info

Product

Resources

About

Orientational relaxation of three different dendrimers in polycarbonate matrix investigated by optical poling

Cited by 15 publications

References 18 publications

Photoinduced molecular polar alignment in E-O polymers by all-optical poling holographic methods

Photoinduced molecular polar alignment in E-O polymers by all-optical poling holographic methods

Photo-Switching dynamics of azo-phenylcarbazoles in polycarbonate around &#x03B2; transition temperature

Picosecond reading of optically poled azophenylcarbazole

Contact Info

Product

Resources

About

Photo-Switching dynamics of azo-phenylcarbazoles in polycarbonate around β transition temperature