Photorefractive and Raman light scattering in lithium niobate ferroelectric crystal

Single-Molecule Nonresonant Wide-Field Surface-Enhanced Raman Scattering from Ferroelectrically Defined Au Nanoparticle Microarrays

“…The Raman scattering spectrum of Au-PPELN with the probe molecule RhB present (Figure c) shows several strong Raman scattering bands located between 1100 and 1800 cm –1 . These bands are assigned to the probe molecule, as Raman bands arising from PPELN occur only below 1000 cm –1 . ,− The Raman scattering spectrum for the probe molecule on the PPELN surface without Au nanoparticles is characterized by the absence of Raman peaks for RhB (Figure c). The absence of RhB Raman peaks indicates that the Au nanoparticles enhance the Raman scattering through plasmon enhancement. , This confirms that the SERS signal originates in RIE regions where Au nanoparticles have been deposited.…”

Integrated research of structural and optical homogeneities of the lithium niobate crystal with low photorefractive effect

“…First, the Raman spectra were excited by significantly less power than PILS (3 and 160 mW, respectively). Second, the dominant contribution to the parameter in Raman scattering makes the first (central) layer of PILS indicatrix [23], and the dominant contribution to the opening angle of the PILS indicatrix makes the third layer. That is evident in Raman scattering asymmetry of the central layer of the indicatrix, and in for PILS of the third layer.…”

“…Temporal changes in the central (first) layer, directly in the passage of the laser beam, are studied least [1,23]. From Fig.…”