People
Light Emitting Diode and Optical Sensor with Subwavelength Periodic Structure
NAOI Yoshiki[Professor]
Division of Next-generation Photonics (Joint Faculty)
Tohoku University, Japan, Dr. Eng, 1993
1993 Research Associate, Fac. of Eng., Tokushima University
2013- Professor, Graduate School of Technology, Industrial and Social Sciences, Tokushima University
2019- Professor, Institute of Post-LED Photonics, Tokushima University
- Medical Photonics
- Visible
- Infrared
- Terahertz
- Deep ultraviolet
- Information Technology
- Medical
- Inspection
- Light source / Sensing
- etc.
- LED
- ultraviolet
- Nano photonics device
- meta-lens
- refractive index evaluation
Research Interests
The purpose of this research is to develop high performance nano-photonic devices from the visible to ultraviolet wavelength region for IoT society realization.
Single-layer sub-wavelength structure with the period slightly smaller than the wavelength of light has very unique properties due to the interactions between the eigenmodes of electromagnetic waves originated from the periodic distribution of refractive index, and light. In this study, we have investigated the physical mechanism of the nano-structure and developed the highly polarized light emitting diodes and photonics sensors for the evaluation of refractive index and magnetic field intensity.
We have already developed the 370 nm highly polarized ultraviolet light emitting diode, highly sensitive refractive index sensor with normal incident geometry operating near the ultraviolet wavelength, and highly sensitive magnetic field sensor with normal-incidence geometry operating in visible-wavelength region.
