Chapter

Photorefractive Materials and Their Applications 2

Volume 114 of the series Springer Series in Optical Sciences pp 327-362

Photorefractive Effects in Sn2P2S6

  • Alexander A. GrabarAffiliated withInstitute of Solid State Physics and Chemistry, Uzhgorod National University
  • , Mojca JazbinšekAffiliated withNonlinear Optics Laboratory, Swiss Federal Institute of Technology
  • , Alexander N. ShumelyukAffiliated withInstitute of Physics, National Academy of Sciences
  • , Yulian M. VysochanskiiAffiliated withInstitute of Solid State Physics and Chemistry, Uzhgorod National University
  • , Germano MontemezzaniAffiliated withNonlinear Optics Laboratory, Swiss Federal Institute of TechnologyLaboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS, CNRS UMR 7132), University of Metz and Supélec
  • , Peter GünterAffiliated withNonlinear Optics Laboratory, Swiss Federal Institute of Technology

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Abstract

Tin hypothiodiphosphate (Sn2P2S6) is a very promising material for photorefractive applications in the red and near-infrared wavelength range. The main advantage of Sn2P2S6 as an infrared-sensitive photorefractive material is its high beam-coupling gain combined with relatively fast response, about two orders of magnitude faster than in the conventionally used photorefractive material BaTiO3 doped with rhodium. Compared to oxide ferroelectrics, which are wide-band-gap dielectrics, Sn2P2S6 crystals are characterized by a narrower band gap (2.3 eV) and a higher photorefractive sensitivity, and are transparent in the range of 530– 8000 nm.