6533b838fe1ef96bd12a4f95

RESEARCH PRODUCT

SNOM study of ferroelectric domains in doped LiNbO3 crystals

Ginés LifanteJosep Canet-ferrerJuan P. Martínez-pastorEugenio CantelarJ. LamelaF. JaqueJ.a. Sanz-garcíaFernando Cussó

subject

DiffractionMaterials scienceOptical contrastbusiness.industryDopingNear and far fieldWaveguide (optics)Ferroelectricitylaw.inventionOpticsOptical microscopelawOptoelectronicsNear-field scanning optical microscopebusiness

description

Abstract This work shows a study of the periodic ferroelectric domains formed in LiNbO3 crystals doped with rare earths by means of scanning near field optical microscopy (SNOM) technique. It has been observed periodic structures associated with ferroelectric domains with an unexpected high value of the optical contrast working under reflectance SNOM mode. From Raman-Nath diffraction patterns, a refractive index modulation of Δ n ∼ 1 0 − 4 has been calculated. These results were correlated with the ferroelectric periodic domains obtained by the SNOM technique. A light waveguide effects along the ferroelectric domains is suggested to explain the high reflectance contrast observed in SNOM experiments.

yearjournalcountryeditionlanguage
2009-08-01Physics Procedia
https://doi.org/10.1016/j.phpro.2009.07.033