Applied Physics B

, Volume 76, Issue 4, pp 397-402

Saturation effect in azobenzene polymers used for polarization holography

  • P. VárhegyiAffiliated withDepartment of Atomic Physics, Budapest University of Technology and Economics, 1111 Budapest, Budafoki ut 8, Hungary
  • , Á. KerekesAffiliated withDepartment of Atomic Physics, Budapest University of Technology and Economics, 1111 Budapest, Budafoki ut 8, Hungary
  • , S. SajtiAffiliated withDepartment of Atomic Physics, Budapest University of Technology and Economics, 1111 Budapest, Budafoki ut 8, Hungary
  • , F. UjhelyiAffiliated withOptilink Hungary Ltd., 1031 Budapest, Graphisoft Park, Hungary
  • , P. KoppaAffiliated withDepartment of Atomic Physics, Budapest University of Technology and Economics, 1111 Budapest, Budafoki ut 8, Hungary
  • , G. SzarvasAffiliated withOptilink Hungary Ltd., 1031 Budapest, Graphisoft Park, Hungary
  • , E. LőrinczAffiliated withDepartment of Atomic Physics, Budapest University of Technology and Economics, 1111 Budapest, Budafoki ut 8, Hungary

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access

Abstract.

The saturation behavior of diffraction efficiency has been experimentally studied and theoretically modeled in azobenzene polyesters by recording polarization gratings with two beams of orthogonal circular polarization. The model is an extension of the phenomenological expression of Kakichashvili, derived from the rate equations for photoanisotropic materials, taking into account the effect of saturation with time and intensity. The saturation model of the polyester material can be used for the computer simulation of a polarization holographic data storage system under development. The simulation is based on fast Fourier transforms, taking the parameters of the recording material and the optical processes into account. Agreement between measured and simulated results proves the applicability of the saturation model as an efficient tool in the optimization of the system.

PACS: 78.20.Bh; 42.70.Ln; 42.40.Lx