Read e-book online Photorefractive Organic Materials and Applications PDF

By Pierre-Alexandre Blanche

ISBN-10: 331929332X

ISBN-13: 9783319293325

ISBN-10: 3319293346

ISBN-13: 9783319293349

This publication presents entire, state-of-the paintings assurance of photorefractive natural compounds, a category of fabric being able to switch their index of refraction upon illumination. The swap is either dynamic and reversible. Dynamic simply because no exterior processing is needed for the index modulation to be printed, and reversible as the index swap may be transformed or suppressed via changing the illumination trend. those houses make photorefractive fabrics very beautiful applicants for lots of purposes corresponding to snapshot recovery, correlation, beam conjugation, non-destructive checking out, info garage, imaging via scattering media, holographic imaging and show. the sector of photorefractive natural fabric can be heavily with regards to natural photovoltaic and light-weight emitting diode (OLED), which makes new discoveries in a single box appropriate to others.

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Extra resources for Photorefractive Organic Materials and Applications

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4 for the mathematical model), and can be measured by either interferometry or polarimetry. 1 Interferometry To measure the bulk refractive index variation according to an applied electric field, the sample is placed in one arm of an interferometer such as a Mach–Zehnder. As the index changes, the optical path length varies, leading to a phase difference between the two arms and a fringe displacement. The relation between the refractive index change (Δn) and the intensity modulation (ΔI ) is:  !

Developed a stratified device composed of four photorefractive layers as presented in Fig. 21. They observed that the diffraction efficiency increases with the square of the active layer thickness [137]. Hayasaki et al. proposed a new electrode structure where both the anode and the cathode are on the same glass plate [138]. They named this configuration “coplanar electrodes” and the geometry is reproduced in Fig. 22. In this case the electrodes do not need to be transparent and Hayasaki et al.

The advantages over ellipsometry and 1 Introduction to the Photorefractive Effect in Polymers 47 interferometry are that by using a multiphoton microscope, EFISHG can be applied in situ and reveals the molecular orientation in 3D. In a multiphoton microscope, a short pulse of light (femtosecond) is focused in the sample by the objective of the microscope. Interacting with the material, higher harmonics of the fundamental frequency are produced and this light is collected by the microscope objective.

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Photorefractive Organic Materials and Applications by Pierre-Alexandre Blanche

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