Polarization holography

Todorov, T., Nikolova, L., and Tomova, N. Polarization holography. 1 A new high-efficiency organic material with reversible photoinduced birefringence. Appl. Opt. 23, 4309 (1984). 

In the case of azobenzene containing materials, it is preferable to use another type of holography called polarization holography [47]. The difference between intensity and polarization holography is illustrated in Fig. 6.15. In Fig. 6.15a, the two beams that are incident on the film (reference and object beams) have the same polarization... 

FIGURE 6.15 Principle of (a) intensity holography and (h) polarization holography. 

T. Todorov, L. Nikolova, andN. Tomova. Polarization holography. 2 Polarization holographic gratings in photoanisotropic materials with and without intrinsic birefringence. App/. Opt., 23 4588-4591, 1984. 

After application of the known theory of interference pattern calculation (Born, 1970 ) and the theory of polarization holography the reconstructed image of the object wave has the form (Kakichashvili, 1974) ... 

In section 3, the applications of ordinary holography and polarization holography of fulgide film were studied, which were respectively based on the photochromic and photo-induced anisotropy properties. The properties of holographic recording such as diffraction efficiency, spatial resolution and optimal exposure were measured. 

We found that there exists photo-induced anisotropy in fulgide-doped polymeric films M, which can be used in polarization holography application. When the colored states are irradiated by a linearly polarized 650 nm laser, the films returns to the bleached states and photo-induced anisotropy is produced during this process. The mechanism of photo-induced anisotropy in the fulgide films is the following HI anisotropic absorbing molecules of fulgide are immobilized randomly in the PMMA polymeric matrix, which shows... 

Fig. 8. The distributions of the interference fields in four kinds of polarization holography storage and the corresponding molecular distributions and orientations...

Fig. 17. Diffraction efficiency spectra of the (a) Ordinary holography (b) Orthogonal linearly polarization holography (c) Orthogonal circularly polarization holography...

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