【Epitaxy Papers】The second-order nonlinear optical properties of κ-phase gallium oxide

      Researchers from the Rice University have published a dissertation titled "The second-order nonlinear optical properties of κ-phase gallium oxide" in APL Materials.

Abstract

      In this study, we present the first characterization of the effective second-order nonlinear optical susceptibility X^（2）_eff and the second-order susceptibility tensor element d₃₁ of κ-phase gallium oxide (κ-Ga₂O₃) using a second harmonic generation (SHG) technique. At the wavelength of 850 nm, we measured a X^（2）_eff value of 0.1068 pm/V and a d₃₁ value of 0.0566 pm/V. In addition, we investigated the wavelength and polarization dependence of X^（2）_eff⁠. These findings could be a constructive step toward expanding the potential applications of Ga₂O₃ as a novel optical material platform, complementing its emerging role as a competitive next-generation material for electronics.

DOI：

https://doi.org/10.1063/5.0268375