Electrooptic materials

Electron tubes Electron tunneling Electrooptic materials Electrooptics Electroosmosis... 

In an electrooptic material the phase retardation angle is controlled by altering birefringence, which is in turn controlled by the potential of an apphed electric field. An electrooptic device thus acts as a variable phase optical retardation plate, and can be used to modulate the wavelength or intensity of an incident beam. 

Electrooptic materials. The dependence of refractive index on the electric field or the lattice polarization is referred to as the electrooptic effect ... 

Kerr coefficient -for electrooptic materials [CERAMICS - NONLINEAROPTICAL AND ELECTKOOPTIC CERAMICS] (Vol 5)... 

M. E. Van der Boom, A. G. Richter, J. E. Malinsky, P. A. Lee, N. R. Armstrong, P. Dutta, and T. J. Marks, Single reactor route to polar superlattices. Layer-by-layer self-assembly of large-response molecular electrooptic materials by protection-deprotection, Chem. Mater. 13, 15-17 (2001). 

Since this chapter is focused on electrooptic materials and two-photon absorption, we will not consider measurement techniques for y and y(31 in detail, but refer the interested reader to Ref. [19]. In this section, we will briefly describe some of the techniques that have been used for the measurement of the two-photon cross-section, d. We first recall that the 2PA behavior of a molecule is characterized by a spectrum entirely analogous to a one-photon absorption (1PA) spectrum. Although, from the point of view of an application at a particular wavelength, measurements of d at only that wavelength may contribute to a figure-of-merit for that application, more generally, to understand structure-property relationships, it is helpful to acquire 2 PA data over as wide a frequency range as permitted by the lasers available and by the onset of 1PA. 

Barrett, C., Choudhury, B., Natansohn, A., Rochon, P. (1998). Azocarbazote polymethacrylates as single-component electrooptic materials. Macromo/ecM/es 31,4845-4851. 

In addition to the use of heterometal alkoxides, metal alkoxides are often associated with more easily available precursors such as acetates for the SG route to multicomponent oxides. A number of such alkoxide acetate precursors [e.g., MNb2(/i-OAc)2(/i-OR)4(OR)6 (M = Cd or Mg), PbZr3(/t4-0)(/i-0Ac)2(/i-OR)5(OR)5, and Gd2Zr6(/i4-O)2(pi-OAc)6(/t-OR)l0(OR)i0 (with R = i-Pr)] were characterized (564) by X-ray crystallography. Their hydrolytic studies indicate their potential use as precursors for the synthesis of electrooptical materials, for example, Pb(ScNb)03 (PSN), and dielectric ceramics, for example, [PbMg1/3Nb2/303] (PNM). 

We consider only conventional LCDs that use nematic liquid crystals as the electrooptic material. There are less common types of LCDs that use other types of liquid crystals, such as cholesteric and ferroelectric liquid crystals. 

This is certainly the most advanced potential application of FLCPs. Taking advantage of the processability of FLC polymers, Idemitsu Kosan Co. has fabricated a large-area, static-driven display (12x100 cm) and a dynamically driven simple matrix display (13x37 cm) [7, 19]. The performance of these two demonstrators is summarized in Table 8. The electrooptic material used was plasticized polyoxyethylene XVIII (Fig. 26). 

Barrett C, Choudhury B, Natansohn A, Rochon P. 1998. Azocarbazole polymethacrylates as single component electrooptic materials. Macromolecules 31(15) 4845 4851. 

Agullo-Lopez, R, Cabrera, J.M., and Agullo-Rueda, F. (1994) Electrooptics Phenomena, Materials, and Applications, Academic Press, London. Gives a very detailed description of aU aspects of electrooptic materials. Two of the chapters cover applications. It also provides information about how electrooptic coefficients are determined experimentally. 

Explain why BaTiOs is a linear electrooptic material below E but a quadratic electrooptic material above E. 

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