Anisotropic van der Waals Crystal with High Refractive Index and
  Transparency for UV-Visible Range Applications

Slavich, Aleksandr; Ermolaev, Georgy; Zavidovskiy, Ilya; Grudinin, Dmitriy; Kravtsov, Konstantin; Tatmyshevskiy, Mikhail; Mironov, Mikhail; Toksumakov, Adilet; Tselikov, Gleb; Fradkin, Ilia; Voronin, Kirill; Povolotskiy, Maksim; Matveeva, Olga; Syuy, Alexander; Yakubovsky, Dmitry; Tsymbarenko, Dmitry; Kruglov, Ivan; Ghazaryan, Davit; Novikov, Sergey; Vyshnevyy, Andrey; Arsenin, Aleksey; Volkov, Valentyn; Novoselov, Kostya

doi:10.48550/arXiv.2410.08771

Anisotropic van der Waals Crystal with High Refractive Index and Transparency for UV-Visible Range Applications

preprint

posted on 2024-10-15, 16:00 authored by Aleksandr Slavich, Georgy Ermolaev, Ilya Zavidovskiy, Dmitriy Grudinin, Konstantin Kravtsov, Mikhail Tatmyshevskiy, Mikhail Mironov, Adilet Toksumakov, Gleb Tselikov, Ilia Fradkin, Kirill Voronin, Maksim Povolotskiy, Olga Matveeva, Alexander Syuy, Dmitry Yakubovsky, Dmitry Tsymbarenko, Ivan Kruglov, Davit Ghazaryan, Sergey Novikov, Andrey Vyshnevyy, Aleksey Arsenin, Valentyn Volkov, Kostya Novoselov

Thanks to their record high refractive index and giant optical anisotropy, van der Waals (vdW) materials have accelerated the development of nanophotonics. However, traditional high refractive index materials, such as titanium dioxide (TiO2), still dominate in the most important visible range. This is due to the current lack of transparent vdW materials across the entire visible spectrum. In this context, we propose that germanium disulfide (GeS2) could offer a significant breakthrough. With its high refractive index, negligible losses, and biaxial optical anisotropy across the whole visible range, GeS2 has the potential to complement TiO2 and close the application gap of vdW materials in the visible spectrum. The addition of GeS2 could have a profound impact on the design of van der Waals nanophotonic circuits for any operation wavelength from ultraviolet to infrared, emphasizing the significance of the potential impact of GeS2 on the field of nanophotonics.