I.A. Forofonov1, A.O. Sinelnikov2, I.A. Smetanin3, A.V. Koroleva4, E.A. Smetanin5

1 National Research Nuclear University MEPhI (Moscow, Russia)
2–5 RUDN University named Patrice Lumumba (Moscow, Russia)
4 JSC "A.A. Bochvar High-Technology Research Institute of Inorganic Materials" (Moscow, Russia)
1 forofonov.goga@mail.ru, 2 sinelnikov-ao@rudn.ru, 3 smetanin_03@bk.ru, 4 1132249176@rudn.ru, 5 esmetanin200513@gmail.com

Problem Statement. The advancement of microsystems technology and integrated photonics creates a consistent demand for the development of miniature, energy-efficient, and high-precision rotation sensors. A promising direction is the creation of all-solid-state laser gyroscopes based on ring resonators monolithically integrated into a planar structure. A key technological barrier to their implementation is the lack of active laser media that combine optical efficiency with structural stability and the possibility of epitaxial matching with semiconductor substrates.

Research Objective. The objective of this work was to develop a methodology and perform a calculation of the optimal composition for a four-component solid solution based on gadolinium-scandium-gallium garnet. The task was to determine the stoichiometry that ensures simultaneous matching of the material's crystal lattice parameter with an InP substrate and achievement of the required band gap, which is a necessary condition for creating a stable active medium in an integrated circuit.

Main Results. Based on the application of Vegard's rule to a system of four binary compounds (GdGa, GdO, ScGa, ScO), the optimal composition Gd3,2Sc2,2Ga1,05O0,5 was determined. It was established that this composition provides a crystal lattice parameter of a
≈ 5,86 Å, which matches the parameter of the InP substrate, and a band gap of Eg ≈ 4,63 eV. Graphical analysis confirmed that the found concentration parameters are the only solution satisfying both conditions of structural and electronic matching.

Practical Significance. The obtained results provide a ready computational basis for the subsequent synthesis of a promising material using epitaxial growth methods. This paves the way for creating a fundamentally new element for integrated optical gyroscopes a thin-film active medium with engineered properties. The developed methodology can be applied to engineer the composition of other multicomponent materials in photonics and microelectronics, contributing to the advancement of miniature inertial navigation technologies.

Forofonov I.A., Sinelnikov A.O., Smetanin I.A., Koroleva A.V., Smetanin E.A. Solid-state active medium for integrated optical gyroscopes. Achievements of modern radioelectronics. 2026. V. 80. № 5. P. 81–88. DOI: https://doi.org/10.18127/j20700784-202605-09 [in Russian]

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