We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Kinetics of the Domain Structure in Uniform Electric Field in LiNbO<sub>3</sub> with Surface Layer Modified by Soft Proton Exchange.
- Authors
Savelyev, Evgeniy; Akhmatkhanov, Andrey; Tronche, Hervé; Doutre, Florent; Lunghi, Tommaso; Baldi, Pascal; Shur, Vladimir
- Abstract
The creation of periodic domain structures in lithium niobate crystals makes it possible to realize highly efficient nonlinear optical interactions in optical waveguides. The influence of near-surface H+ ion concentration gradient on the domain kinetics in uniform electric field in lithium niobate crystals modified by soft proton exchange is studied. The spatial distribution of the Hþ ions concentration in the surface layer is obtained by confocal Raman microscopy. The observed anomalous evolution of the domain structure at the surface represents the formation of stripe domains and their anisotropic growth along three directions. The domain imaging in the bulk allows revealing a comb-like domain shape. The obtained strong influence of the proton exchange duration on the threshold field is attributed to the action of the concentration gradient in the nearsurface layer, which is considered as an analog of the internal bias electric field. It is shown that the internal bias field is proportional to the increase in the concentration gradient in the surface layer. The mechanism of the comb-like domain formation is proposed. The obtained results can be used for development of domain engineering methods in optical waveguides.
- Subjects
UNIFORM spaces; ELECTRIC fields; OPTICAL waveguides; CONCENTRATION gradient; LITHIUM niobate; LITHIUM ions
- Publication
Physica Status Solidi - Rapid Research Letters, 2024, Vol 18, Issue 4, p1
- ISSN
1862-6254
- Publication type
Article
- DOI
10.1002/pssr.202300420