Wide-Bandgap Semiconductor NanophotonicsResearch

Diamond is widely used in quantum technologies, including applications such as single-photon sources and quantum sensors. The introduction of photonic nanostructures can further enhance the performance of these devices. However, nanofabrication of diamond remains challenging, and realizing high-quality photonic nanostructures requires advanced technological development. Meanwhile, gallium oxide is attracting attention for its potential in power electronics, but it also exhibits interesting characteristics from a photonics perspective, such as a wide transparency window and the presence of color centers. Nevertheless, research on the photonic applications of gallium oxide has only just begun.
We are advancing the development of nanofabrication techniques for diamond, one of the key platforms for quantum technologies, and applying them to nanophotonic devices. In addition, under the leadership of Assistant Professor Kamino, we are exploring the frontier of nanophotonics using gallium oxide, a wide-bandgap semiconductor, covering a broad range of topics from crystal growth and optical property characterization to nanofabrication and device applications.