The volume holographic optical storage potential in azobenzene containing polymers

Volume holographic data storage is one of the most promising techniques to improve both the storage capacity of devices and the transfer data rate. Among the materials proposed as storage data media, azobenzene containing polymers have received much attention. Some of their properties seem to be suitable for holographic storage applications. However, they still present several problems, mainly those related with light sensitivity, response time and stability of the stored information. In this article we review the work performed on volume holographic storage using azobenzene containing polymers as well as the different approaches that have been proposed to overcome those problems.

[1]  Yang-Kyoo Han,et al.  Photo-responsive Polymers and their Applications to Optical Memory , 2006 .

[2]  Rainer Hagen,et al.  Photoaddressable Polymers for Optical Data Storage , 2001 .

[3]  Brian H. Marcus,et al.  Holographic data storage technology , 2000, IBM J. Res. Dev..

[4]  Dietrich Haarer,et al.  Relaxation of holographic gratings in liquid‐crystalline side chain polymers with azo chromophores , 1995 .

[5]  S. Hvilsted,et al.  Methacrylic azopolymers for holographic storage: A comparison among different polymer types , 2007 .

[6]  Shaoping Bian,et al.  High-efficiency holographic volume index gratings in DR1-dye-doped poly(methyl methacrylate). , 2002, Optics letters.

[7]  Shaoping Bian,et al.  Real-time holographic reflection gratings in volume media of azo-dye-doped poly(methyl methacrylate). , 2002, Optics letters.

[8]  T. Ikeda,et al.  Holographic gratings and holographic image storage via photochemical phase transitions of polymer azobenzene liquid-crystal films , 2000 .

[9]  Sergei S. Orlov,et al.  Holographic data storage systems , 1993, Proceedings of the IEEE.

[10]  Holographic grating generation in thick polymer films containing azo dye molecules , 2001 .

[11]  D. Haarer,et al.  Diblock Copolymers with Azobenzene Side-Groups and Polystyrene Matrix: Synthesis, Characterization and Photoaddressing , 2004 .

[12]  S. Hvilsted,et al.  Photoinduced optical anisotropy in azobenzene methacrylate block copolymers: Influence of molecular weight and irradiation conditions , 2009 .

[13]  P. J. V. Heerden A New Optical Method of Storing and Retrieving Information , 1963 .

[14]  Demetri Psaltis,et al.  Holographic Data Storage , 1998, Computer.

[15]  S. Yasuda,et al.  Design of Dye Concentrations in Azobenzene-Containing Polymer films for Volume Holographic Storage , 2004 .

[16]  S. Hvilsted,et al.  The Azobenzene Optical Storage Puzzle – Demands on the Polymer Scaffold? , 2001 .

[17]  Paul Rochon,et al.  Photoinduced motions in azo-containing polymers. , 2002, Chemical reviews.

[18]  T. Ikeda,et al.  Formation of bragg gratings with large angular multiplicity by means of the photoinduced reorientation of azobenzene copolymers. , 2007, Langmuir : the ACS journal of surfaces and colloids.

[19]  H. Schmidt,et al.  Polymer Blends with Azobenzene‐ Containing Block Copolymers as Stable Rewritable Volume Holographic Media , 2007 .

[20]  D. Gabor A New Microscopic Principle , 1948, Nature.

[21]  Jacques A. Delaire,et al.  Linear and Nonlinear Optical Properties of Photochromic Molecules and Materials. , 2000, Chemical reviews.

[22]  H. Schmidt,et al.  Holographic Gratings in Diblock Copolymers with Azobenzene and Mesogenic Side Groups in the Photoaddressable Dispersed Phase , 2005 .

[23]  S. Hvilsted,et al.  Volume holographic storage and multiplexing in blends of PMMA and a block methacrylic azopolymer, using 488 nm light pulses in the range of 100 ms to 1 s , 2008 .

[24]  Kunihiro Ichimura,et al.  Photoalignment of Liquid-Crystal Systems. , 2000, Chemical reviews.

[25]  M. Moharam,et al.  Criterion for Bragg and Raman-Nath diffraction regimes. , 1978, Applied optics.

[26]  Tomiki Ikeda,et al.  Bragg-type polarization gratings formed in thick polymer films containing azobenzene and tolane moieties. , 2007, Langmuir : the ACS journal of surfaces and colloids.

[27]  K. Jankova,et al.  Synthesis, characterization and photoinduction of optical anisotropy in liquid crystalline diblock azo-copolymers , 2007 .

[28]  E. Kramer,et al.  Blends of Poly(methacrylate) Block Copolymers with Photoaddressable Segments , 2007 .

[29]  B. D. Cook,et al.  Unified Approach to Ultrasonic Light Diffraction , 1967, IEEE Transactions on Sonics and Ultrasonics.

[30]  Nirmal K. Viswanathan,et al.  Surface relief structures on azo polymer films , 1999 .

[31]  A. Matharu,et al.  Liquid crystals for holographic optical data storage. , 2007, Chemical Society reviews.