Research

Photonic crystal is an artificial optical media possessing a wavelength-scale periodic structure of refractive index. Photonic crytals realize sophisticated optical controls and uniques optical phenomena, which are difficult to realize them by comventional optical materilas. Particularly, photonic crystal nanocvity, which is formed by artificially introducing a “defect“ in the periodic structure, is a fascinating platform for various applications. Photonic crystal nanocavity confines light strongly and tightly within a tiny volume, which enables miniaturizing various photoic devices. Thanks to the strong light confinement, the light-matter interaction therein is largely enhanced. This enhanced interaction will bring novel physical phenomena and will be applicable to quantum information devices.

We are investigating photonic nanostructures including photonic crystals for realizing novel control of light and are exploring light-matter interactions in those structures for various applications. We are also studying topological wave engineering aiming at exploration and utilization of the topological properties of classical waves such as light, elastic waves, and sounds.

Main Research Subjects

For details, please see the separate page of each subject or the recent research presentation page.

Design and Fabrication of Photonic Nanostructures

We are aiming at realizing high quality photonic nanostructures and at opening a new paradigm of lightwave control by using such advanced photonic nanostructures.

Control of Light-Matter Interactions using Photonic Nanostructures

We are investigating the light emission control by using photonic crsytal and photonic crystal nanocavities. We are also exploring novel phenomena in these systems and trying to apply them to quantum optics devices.

Topological Photonics and Topological Phononics

Topological photonics, an emerging field in photonic, is one of main research subjects of our group. The concept of band topology provides novel approaches to control not only light but also sound and elastic waves. We are also exploring topological states of sound and elastic wave.