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Study of thermo-optic and thermo-polarizability coefficients of ions in congruent LiNbO3 open-type optical waveguide using point dipole approximation.
- Source :
- Indian Journal of Physics; Sep2024, Vol. 98 Issue 10, p3681-3688, 8p
- Publication Year :
- 2024
-
Abstract
- The thermo-optic coefficients (TOCs), thermo-polarization coefficients (TPCs) and dn/dT, dα/dT of congruent lithium niobate LiNbO<subscript>3</subscript> / LN (mole ratio Li/Nb = 0.946) are tested within the temperature range of 293–773 K at λ = 0.4358 µm, λ = 0.6328 µm and λ = 1.15232 µm employing the point dipole approximation. The refractive indices, n<subscript>o</subscript> and n<subscript>e</subscript>, were first determined at these temperatures and wavelength ranges, by iterating the electronic polarizabilities of Nb<superscript>5+</superscript> and O<superscript>2+</superscript> ions. It has been found that the polarizability of Nb<superscript>5+</superscript> ions drops and that of O<superscript>2−</superscript> ions increases when temperature rises for a particular wavelength. Both Nb<superscript>5+</superscript> and O<superscript>2−</superscript> lose polarizability with increasing wavelength for a given temperature. TOCs for n<subscript>o</subscript> and n<subscript>e</subscript> rise as the temperature rises. The TOC rises as wavelength for n<subscript>o</subscript> and n<subscript>e</subscript> decreases. TPCs of O<superscript>2−</superscript> rise in ions and temperature causes Nb<superscript>5+</superscript> ions to decrease. At a particular temperature, TPCs of O<superscript>2−</superscript>ions become less while Nb<superscript>5+</superscript> ions grow as wavelengths rise. Generally, it is used in potential electronic polarizabilities and thermal refraction applications. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09731458
- Volume :
- 98
- Issue :
- 10
- Database :
- Complementary Index
- Journal :
- Indian Journal of Physics
- Publication Type :
- Academic Journal
- Accession number :
- 178877359
- Full Text :
- https://doi.org/10.1007/s12648-024-03072-z