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Holographic gratings switchable

Hikmet and Poels have reduced the percentage of difunctional monomer (Fig. 3) in the same type of mixture even further to less than 1 % in order to obtain anisotropic gels. Although holographic gratings were not reported, switchable gratings of 100 p,m from a mask showed very promising results [28],... [Pg.371]

Kardinahl, T. Franke, H. Holographic Grating.s in Organic Photochromies Nonlinear and Switchable Gratings 1996 Vol. 2688(Holographic Materials II), pp. 52-58. [Pg.3269]

D photonic crystals can be made by holographic lithography. Switchable photonic crystals ° can be made by electrically switchable Bragg gratings or holographic polymer dispersed LCs (Fl-PDLC). i... [Pg.279]

Caputo, R., De Sio, L., Veltri, A., Umeton, C., Sukhov, A.V. Development of a new kind of switchable holographic grating made of liquid-crystal films separated by slices of pol5nneric material. Opt. Lett. 29, 1261-1263 (2004)... [Pg.401]

Holographic polymer dispersed liquid crystals (H-PDLCs) are obtained by photopolymerisation of a hquid crystal-prepolymer mixture in the interference field of two or more laser beams [14,15]. This induces phase separation in which hquid crystalline material predominantly congregates in dark regions of the optical interference pattern [16,17]. As a result, holographic gratings with extremely high refractive-index contrast are formed. In addition, the diffraction efficiency of these gratings is electrically switchable the apphcation of an electric field results in reorientation of the nematic director field within... [Pg.136]

Figure 6 Cross-section of a switchable grating from photoresist (Strategy 3). By using standard semiconductor fabrication techniques, a cell can be constructed with a holographically patterned central electrode. After filling with LC, the cell can be switched on and off with an electric field applied between the outer unpatterned electrodes. Figure 6 Cross-section of a switchable grating from photoresist (Strategy 3). By using standard semiconductor fabrication techniques, a cell can be constructed with a holographically patterned central electrode. After filling with LC, the cell can be switched on and off with an electric field applied between the outer unpatterned electrodes.
Goldenberg LM, Kulikovska O, Stumpe J. 2005. Thermally stable holographic surface relief gratings and switchable optical anisotropy in films of an azobenzene containing... [Pg.87]

Natarajan, L.V., Shepherd, C.K., Brandelik, D.M., Sutherland, R.L., Chandra, S., Tondiglia, V.P., Timlin, D., Bunning, T.J. Switchable holographic polymer-dispersed liquid crystal reflection gratings based on thiol-ene photopolymerization. Chem. Mater. 15, 2477-2484 (2003)... [Pg.401]

See other pages where Holographic gratings switchable is mentioned: [Pg.356]    [Pg.363]    [Pg.364]    [Pg.364]    [Pg.364]    [Pg.366]    [Pg.369]    [Pg.380]    [Pg.381]    [Pg.3]    [Pg.14]    [Pg.333]    [Pg.364]    [Pg.365]    [Pg.370]    [Pg.372]    [Pg.373]    [Pg.306]    [Pg.402]    [Pg.180]    [Pg.279]    [Pg.402]   
See also in sourсe #XX -- [ Pg.364 , Pg.366 ]



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