Faculty introduction

IMAI Tadayuki 今井 欽之
  • Professor
  • Department of Mechanical and Electrical Systems Engineering, Faculty of Engineering
Faculty Profile
Research Field

Optoelectronic devices, Optical crystal materials, Dielectrics, Holography

Affiliated Academic Societies

The Japan Society of Applied Physics, The Institute of Electronics, Information and Communication Engineers, The Japanese Association for Crystal Growth, Optica

Courses Taught

Startup Seminar A, Startup Seminar B, Engineering Physics 2, Engineering Physics 2 Exercises, Electromagnetic Theory, Electromagnetic Theory Exercises, Semiconductor Engineering, Electric Circuits, Analog Electronic Circuits, Logic Circuits, Introduction to Design, Mechatronics Laboratory (Basic Robotics), Pre-Capstone Project 1, Pre-Capstone Project 2, Capstone Project 1, Capstone Project 2, Laboratory Project 1, Laboratory Project 2

Academic Degrees

Ph. D

Brief Biography

Engineer, Interdisciplinary Research Laboratories, Nippon Telegraph and Telephone Corporation
Research Engineer, Optoelectronics Laboratories, Nippon Telegraph and Telephone Corporation
Senior Research Engineer, Photonics Laboratories, Nippon Telegraph and Telephone Corporation
Senior Research Engineer, Device Innovation Center, Nippon Telegraph and Telephone Corporation

Related Links

researchmap

Research Overview

After developing holographic devices such as multi-layered waveguide holographic memories, he successfully commercialized the innovative optical material KTN (KTa1-xNbxO3) in 2005. The developed KTN has a huge refractive index modulation effect, creating a new concept of bending light by modulating the refractive index. Using this principle, a high-precision, high-speed substrate thickness measurement device and automatic tunnel surveying system were developed. In parallel, he made efforts to elucidate the physical background of this light bending phenomenon, and constracted the underlying theory. In recent years, he has been searching for materials that exhibit even larger refractive indexes, and his focus has shifted to optical sensing systems that use these crystal materials.

List of Researches
Research Keywords

Optical measurement, Ferroelectrics, Electrooptic Effect

Academic Papers

1. T. Imai, S. Kawamura, and S. Oka, "Space charge assisted evaluation method of the elasto-optic coefficients of electrooptic crystals", Opt. Mat. Express 10(9), 2181-2191, 2020.
2. T. Imai, S. Yagi, S. Toyoda, J. Miyazu, K. Naganuma, S. Kawamura, M. Sasaura, and K. Fujiura, "Fast response varifocal lenses using KTa1-xNbxO3 crystals and a simulation method with electrostrictive calculations", Appl. Opt. 51(10), 1532-1539, 2012.
3. K. Nakamura, J. Miyazu, Y. Sasaki, T. Imai, M. Sasaura, and K. Fujiura, "Space-charge-controlled electro-optic effect: Optical beam deflection by electro-optic effect and space-charge-controlled electrical conduction", J. Appl. Phys. 104(1), 2008.
etc.

Message

You can't help but hate the studying you are forced to do. Have you ever found anything fun to study? Please enjoy studying.

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