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Relaxation of Raman polarisation rules in H:LiNbO3

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Abstract

We study the influence of hydrogen diffusion on the Raman spectra of highly protonated LiNbO3 waveguides. Vibrations in the lowest frequency range (30–150 cm-1) in various scattering configurations are reported. On the basis of the detected mixing of A1(zz) and E(zx) types of phonons, we show that the formation of off-axis HxLi1-xNbO3 waveguide layers on X-cut LiNbO3 substrates is confirmed by Raman-scattering measurements. An attempt to clarify the structural changes which take place during the proton-exchange process has been made.

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  1. Institute of Solid State Physics, 72 Tzarigradsko Chaussee blvd., 1784, Sofia, Bulgaria

    I. Savova, P. Kircheva & I. Savatinova

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  1. I. Savova
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  2. P. Kircheva
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  3. I. Savatinova
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Correspondence to I. Savatinova.

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PACS

63.20.-e; 78.30.-j; 78.66.-w

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Savova, I., Kircheva, P. & Savatinova, I. Relaxation of Raman polarisation rules in H:LiNbO3. Appl. Phys. A 80, 1117–1122 (2005). https://doi.org/10.1007/s00339-003-2450-8

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  • DOI: https://doi.org/10.1007/s00339-003-2450-8

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