Nanoscale Poling of Polymer Films

Castagna, Riccardo; Milner, A.; Zyss, Joseph; Prior, Yehiam

doi:10.1002/adma.201204394

Cited by 13 publications

(7 citation statements)

References 27 publications

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“…Research efforts are concentrated on material composition, processing and sample fabrication on the one hand [7][8][9][10], and on techniques and methods applied for recording and subsequent analysis on the other hand [7,9,[11][12][13][14][15][16]. In each case, there is a particular need to meet the high demands on precision and repetitive accuracy, accompanying volume holographic operations.…”

Section: Introductionmentioning

confidence: 99%

Spatially Resolved Analysis of Bragg Selectivity

Sabel¹

2015

Applied Sciences

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This paper targets an inherent control of optical shrinkage in photosensitive polymers, contributing by means of spatially resolved analysis of volume holographic phase gratings. Point by point scanning of the local material response to the Gaussian intensity distribution of the recording beams is accomplished. Derived information on the local grating period and grating slant is evaluated by mapping of optical shrinkage in the lateral plane as well as through the depth of the layer. The influence of recording intensity, exposure duration and the material viscosity on the Bragg selectivity is investigated.

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Section: Introductionmentioning

confidence: 99%

Spatially Resolved Analysis of Bragg Selectivity

Sabel¹

2015

Applied Sciences

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“…As a consequence, transmission electron microscopy (TEM) is used to evaluate the degree of nanoparticle assembly [11,14,17]. Scanning force microscopy (SFM) may be applied additionally, to map surface modulations [13,14]. Nanocomposite materials are also the subject of investigations by luminescence microscopy [11].…”

Section: Open Accessmentioning

confidence: 99%

“…Due to the great demand for advanced systems, many efforts are made to characterize and optimize functionally tailored material systems, as well as respective recording techniques [9][10][11][12][13]. With regard…”

Section: Introductionmentioning

confidence: 99%

Imaging of Volume Phase Gratings in a Photosensitive Polymer, Recorded in Transmission and Reflection Geometry

Sabel

Zschocher²

2014

Applied Sciences

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Volume phase gratings, recorded in a photosensitive polymer by two-beam interference exposure, are studied by means of optical microscopy. Transmission gratings and reflection gratings, with periods in the order of 10 μm down to 130 nm, were investigated. Mapping of holograms by means of imaging in sectional view is introduced to study reflection-type gratings, evading the resolution limit of classical optical microscopy. In addition, this technique is applied to examine so-called parasitic gratings, arising from interference from the incident reference beam and the reflected signal beam. The appearance and possible avoidance of such unintentionally recorded secondary structures is discussed.

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“…[1][2][3][4][5] The inherent tensorial properties at all scales promote symmetry considerations at the core of molecular nonlinear optics alongside propagative and quantum issues. Advances in nanoscale science and technologies have come to enable nonlinear optical configurations all the way from the wavelength scale of waveguided optics and microresonators, 6 down to the nanoscale [7][8][9] and single molecule experiments. 10 Quadratic NLO processes require centrosymmetry breaking at the scales from individual molecules to bulk interactions in molecular crystals.…”

Section: Introductionmentioning

confidence: 99%

Nanoscale ordering of planar octupolar molecules for nonlinear optics at higher temperatures

Jarema¹,

Mituś²,

Zyss³

2020

Preprint

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We develop scenarios for orientational ordering of an in-plane system of small flat octupolar molecules at the low-concentration limit, aiming towards nonlinear-optical (NLO) applications at room temperatures. The octupoles interact with external electric poling fields and intermolecular interactions are neglected. Simple statistical-mechanics models are used to analyze the orientational order in the very weak poling limit, sufficient for retrieving the NLO signals owing to the high sensitivity of NLO detectors and measurement chains. Two scenarios are discussed. Firstly, the octupolar poling field is imparted by a system of point charges; the setup is subject to cell-related constraints imposed by mechanical strength and dielectric breakdown limit. The very weak octupolar order of benchmarking TATB molecules is shown to emerge at Helium temperatures. The second scenario addresses the dipoling of octupolar molecules with a small admixture of electric dipolar component. It requires a strong field regime to become effective at Nitrogen temperature range. An estimation of the nonlinear susceptibility coefficient matrix for both scenarios is done in the high-temperature (weak interaction) limit formalism. We argue that moderate modifications of the system like, e.g., an increase of the size of the octupole, accompanied by dipole-assisted octupoling, can increase the poling temperature above Nitrogen temperatures.

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Nanoscale Poling of Polymer Films

Cited by 13 publications

References 27 publications

Spatially Resolved Analysis of Bragg Selectivity

Spatially Resolved Analysis of Bragg Selectivity

Imaging of Volume Phase Gratings in a Photosensitive Polymer, Recorded in Transmission and Reflection Geometry

Nanoscale ordering of planar octupolar molecules for nonlinear optics at higher temperatures

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