Photoinduced permanent gratings inside bulk azodye-doped polymers by the coherent field of a femtosecond laser

Permanent holographic gratings were fabricated in bulk azodye-doped polymethylmethacrylate by the coherent field of a femtosecond laser. Optical microscopy and atomic force microscopy observations revealed that the gratings consist of two parts, surface relief gratings on both surfaces and refractive index modulated volume gratings in the interior of the polymers. The diffraction efficiency of the first-order Bragg for the gratings was estimated to be 90%.

[1]  L Hesselink,et al.  Volume Holographic Storage and Retrieval of Digital Data , 1994, Science.

[2]  J. Kumar,et al.  Laser‐induced holographic surface relief gratings on nonlinear optical polymer films , 1995 .

[3]  Hideo Hosono,et al.  Holographic Encoding of Permanent Gratings Embedded in Diamond by Two Beam Interference of a Single Femtosecond Near-Infrared Laser Pulse , 2000 .

[4]  Zhang,et al.  Low (Sub-1-volt) halfwave voltage polymeric electro-optic modulators achieved by controlling chromophore shape , 2000, Science.

[5]  Hans Coufal.  Holography: Solid information , 1998, Nature.

[6]  Paul Rochon,et al.  Optically induced surface gratings on azoaromatic polymer films , 1995 .

[7]  J. Si,et al.  Optically encoded second-harmonic generation in germanosilicate glass by a femtosecond laser. , 1999, Optics letters.

[8]  H. Rau,et al.  The environmentally controlled photoisomerization of probe molecules containing azobenzene moieties in solid poly(methyl methacrylate) , 1991 .

[9]  S. Hvilsted,et al.  Peptide oligomers for holographic data storage , 1996, Nature.

[10]  Saulius Juodkazis,et al.  Three-Dimensional Optical Data Storage in Vitreous Silica , 1998 .

[11]  Tsuneo Mitsuyu,et al.  Photowritten optical waveguides in various glasses with ultrashort pulse laser , 1997 .

[12]  J. Si,et al.  Controlling the noncentrosymmetry of azodye-doped polymers by nonresonant dual-frequency coherent excitation , 2000 .

[13]  E. Mazur,et al.  Ultrafast-laser driven micro-explosions in transparent materials , 1997 .