6533b7dafe1ef96bd126f596
RESEARCH PRODUCT
Enhanced photorefractive properties of Bi-doped Sn2P2S6
Olivier BidaultAlexander A. GrabarYulian M. VysochanskiiI. M. StoikaIhor V. KedykPierre MatheyGrégory Gadretsubject
Materials sciencePhotorefractive materialsNonlinear opticsBand gapAnalytical chemistrychemistry.chemical_element02 engineering and technologyDielectricNon linear material01 natural sciencesTernary compoundsDoped materials010309 opticsOptics0103 physical sciencesTin HypothiophosphatesOptical propertiesbusiness.industryDopingTwo wave mixingStatistical and Nonlinear PhysicsPhotorefractive effect021001 nanoscience & nanotechnologyPhotorefractive effectAtomic and Molecular Physics and OpticsBismuth additionsLight intensityWavelengthchemistryEnergy transferDielectric propertiesOptical materials0210 nano-technologybusinessTinRefractive indexdescription
International audience; Enhanced photorefractive properties of tin hypothiodiphosphate (Sn2P2S6) crystals as a result of Bi doping are presented. These new crystals were obtained by the vapor-transport technique using stoichiometric Sn2P2S6 composition with an additional amount of Bi up to 0.5 mol. % in the initial compound. The bandgap edges of the obtained crystals are located at ~750 nm and shift toward the red wavelengths with increasing Bi concentration. Sn2P2S6:Bi crystals are found to exhibit larger two-beam coupling gain coefficients (up to 17 cm−1 at a wavelength of 854 nm) as compared to (i) pure Sn2P2S6 (2.5 cm−1 at 854 nm), (ii) Sn2P2S6 crystals modified by the growth conditions (14 cm−1 at 860 nm), and (iii) Te-doped Sn2P2S6 (8 cm−1 at 860 nm). At the same time, for an intensity of 1.3 W/cm2 at 854 nm, buildup times of 0.9 and 2.5 ms at grating spacings of Λ=9.8 and 1.3 μm, respectively, are found; Bi-doped Sn2P2S6 crystals are the fastest among all the presently known Sn2P2S6 crystals operating at near-infrared wavelengths.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-01-23 |