Slavich, A., Ermolaev, G., Grudinin, D., Tatmyshevskiy, M. K., Syuy, A., Pak, N. V., Yakubovsky, D., Mironov, M., Toksumakov, A., Melentev, A., Zhukova, E., Minnekhanov, A., Tselikov, G., Kruglov, I., Novikov, S. M., Vyshnevyy, A., Arsenin, A., Volkov, V. (2026). Scalable van der Waals photonics: High-refractive-index gallium sulfide films with single-crystal optical properties. Applied Physics Letters. https://doi.org/10.1063/5.0320536