April 3, 2024
RIKEN
Keio University
A joint research group, led by Team Leader Yuichiro K. Kato of the Quantum Optoelectronics Research Team at the RIKEN Center for Advanced Photonics (who is also a principal investigator at the Kato Nanoscience and Quantum Photonics Laboratory, RIKEN Cluster for Pioneering Research) and Shun Fujii (a former Special Postdoctoral Researcher at RIKEN and currently an assistant professor at the Department of Physics, Faculty of Science and Technology, Keio University), has demonstrated that by transferring an atomic layer nanomaterial onto a high-Q optical microresonator, second-order nonlinear wavelength conversion, which has been conventionally limited, can be generated with high efficiency even with a weak continuous-wave laser.
These research findings are expected to lead to applications in high-performance photonics devices that utilize atomic-scale two-dimensional materials.
Generally, powerful laser light and nonlinear optical materials are essential for high-efficiency optical wavelength conversion. However, miniaturizing them simultaneously is not easy, and this has been a challenge for the miniaturization and future application of high-performance wavelength conversion devices.
The joint research group has now discovered that by combining a monolayer two-dimensional material, with a thickness of just three atoms, with an optical microresonator device, the material's intrinsic nonlinear optical properties can be altered externally. This method is expected to dramatically increase the degree of freedom in the development of nanoscale optical devices.
This research was published in the online edition of the scientific journal " Nano Letters " on April 1.
For the full press release, please see below.