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Evolution of Light Generation and Manipulation
Researchers

2005.10〜2006.3 2006.10〜2010.3 2007.10〜2011.3
Jiro
Itatani
Ryosuke
Shimizu
Masaya
Nagai
Junko
Ishi-Hayase
Haruka
Maeda
Fumiaki
Miyamaru
Shinji
Miyoki
Toru
Morishita
   
 
  URL:

http://science.shinshu-u.ac.jp/~thz/

 Curriculum Vitae

【 Education 】

BS in Applied Physics, OsakaUniversity, Osaka, Japan 1999,
PhD in Applied Physics, OsakaUniversity, Osaka, Japan 2004.

【 Professional appointments 】

Postdoctoral Fellow, Japan Society for the Promotion of Science (JSPS) 2004,
Research Scientist, National Research Institute for Metals (NRIM) 1999,
Research Scientist, RIKEN 2005,
Assistant Professor, Department of Physics, Faculty of Science at Shinshu University 2006.

− Research interests −
Terahertz Spectroscopy, Photonic Crystal, Metamaterial
  Introduction of the project

For controlling of light photonic crystals have been extensively investigated in the past some decades. Many interesting optical phenomenon, i.e. photonic band gap, super prism effect etc., can be brought to realization by using Bragg diffractions in the periodic structure of different dielectric materials. Contrary to periodic structure, fractals, which consist of self-similar structure, is considered as a promising approach for manipulating electromagnetic waves. Although fractals are originally mathematical concept, they can be observed in real world, i.e. veins of a leaf, capillary blood vessel, etc.

However, only little investigations about the interaction of fractals with electromagnetic waves have been reported so far. If we use fractals as a subwavelength unit cell of metamaterials, they have a great potential to show exotic optical characteristics and consequently, to make useful novel optical devices. Especially, based on the fractal’s characteristic that some kind of ideal fractals has an infinite surface area in a finite volume (or an infinite boundary length in a finite area), the extremely small size of metamaterials with respect to the wavelength at an operation frequency can be possibly constructed.

Based on the above background, the goal of this study is to develop optical devices in terahertz (THz) region with fractal structures. One of targeted devices is a photoconductive fractal antenna, which can radiate a high power THz wave owing to the strong local resonance in the fractal design. In addition, by using fractal structure as a unit cell, I will show a new approach to develop the THz metamaterials which has a unique optical property to fractal structure.

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