The second-order nonlinear optical properties of <i>κ</i>-phase gallium oxide
In this study, we present the first characterization of the effective second-order nonlinear optical susceptibility χeff(2) 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 χeff(2) 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 χeff(2). 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.
Authors
- Ziyi He (ORCID: https://orcid.org/0000-0003-3833-6426)
- Yuji Zhao (ORCID: https://orcid.org/0000-0001-9199-4159)
- Pulickel M. Ajayan
- Mingfei Xu (ORCID: https://orcid.org/0000-0002-1717-1290)
- Kai Fu (ORCID: https://orcid.org/0000-0002-9405-7512)
- Rui Xu (ORCID: https://orcid.org/0000-0002-7072-1976)
- Hanyu Zhu (ORCID: https://orcid.org/0000-0003-3376-5352)
- Xiang Zhang (ORCID: https://orcid.org/0000-0003-4004-5185)
- Tao Li (ORCID: https://orcid.org/0000-0003-0916-1743)
- Xuan Zhao (ORCID: https://orcid.org/0000-0003-1660-5605)
- Jingan Zhou (ORCID: https://orcid.org/0000-0002-7057-7783)
- Jacob T. Robinson (ORCID: https://orcid.org/0000-0002-3509-3054)
- Xiaodong Zhang (ORCID: https://orcid.org/0000-0002-7528-9828)
- Cheng Chang (ORCID: https://orcid.org/0000-0002-0677-0677)
- Giovanni Cerqueira (ORCID: https://orcid.org/0000-0002-6600-1765)
Institutions
- University of Utah (US)
- Suzhou Institute of Nano-tech and Nano-bionics (CN)
- Arizona State University (US)
- Rice University (US)
Publication Details
- Journal
- APL Materials
- Published
- 2025-10-01
- DOI
- https://doi.org/10.1063/5.0268375
- Citations
- 2
- Primary Topic
- Ga2O3 and related materials
- Type
- article
- Field-Weighted Citation Impact
- 0.85