Tera-Photonics Research Team

Our team develops state-of-the-art frequency-tunable THz-wave sources which exploit new THz-wave application fields. A nonlinear optical process is utilized for realizing the THz-wave source which lights up the THz-wave gray zone, and our original design and method will be demonstrated. We develop THz sources with high output, wide tunability, high stability and narrow linewidth.

Active collaboration with both internal and external research groups is carried out for exploring new applications by development of instrument combined with new THz-wave sources. Advanced THz-wave technologies are also being developed in cooperation with industry to establish practical THz-wave sources and technologies in the world.

Research Fields

Physics / Engineering / Chemistry / Materials Sciences / Biology & Biochemistry / Molecular Biology & Genetics / Pharmacology & Toxicology / Clinical Medicine / Agricultural Sciences / Environment & Ecology / Space Science

Research Subjects

• Research on frequency-agile ultra-widely tunable THz-wave sources
• Research on high-sensitive THz-wave detection
• Research on THz-wave applications using frequency-agile THz-wave source
• THz spectroscopic database

Publications

1. Takashi Notake, Kouji Nawata, Hiroshi Kawamata Takeshi Matsukawa, Qi Feng and Hiroaki Minamide
   Development of an ultra-widely tunable DFG-THz source with switching between organic nonlinear crystals pumped with a dual-wavelength BBO optical parametric oscillator
   Optics Express, vol.20, No.23 pp.25850-25857 Nov. (2012)
2. Takayuki Watanabe, Stephane Boubanga Tombet, Yudai Tanimoto, Yuye Wang, Hiroaki Minamide, Hiromasa Ito, Denis Fateev, Viacheslav Popov, Dominique Coquillat, Wojciech Knap, Yahya Meziani, Taiichi Otsuji
   Ultrahigh sensitive plasmonic terahertz detector based on an asymmetric dual-grating gate HEMT structure
   Solid-State Electronics, Volume 78, 109–114, Dec. (2012)
3. Kouji Nawata, Takumi Abe, Yoshiki Miyake, Atsushi Sato, Kazuhiro Asai, Hiromasa Ito, Hiroaki Minamide
   Efficient Terahertz-Wave Generation Using a 4-Dimethylamino-N-Methyl-4-Stilbazolium Tosylate Pumped by a Dual-Wavelength Nd:YAG Laser
   Appl. phys. express, Vol. 5, No. 11, 112401, Oct. (2012)
4. Akihide Hamano, Yoshinobu Takatsu, Seigo Ohno, Hiroaki Minamide, Hiromasa Ito and Yoshiyuki Usuki
   Rapid Imaging of Carrier Density of Si Using Reflectance Measurement in the Terahertz Region
   Materials Science Forum Vol. 725, pp. 227-230, July (2012)
5. Akihide Hamano, Seigo Ohno, Hiroaki Minamide, Hiromasa Ito and Yoshiyuki Usuki
   Nondestructive Measurement of Carrier Density in GaAs Using Relative Reflectivity of Two Terahertz Waves
   Materials Science Forum Vol. 725, pp. 109-112, July (2012)
6. Akihide Hamano, Seigo Ohno, Hiroaki Minamide, Hiromasa Ito and Yoshiyuki Usuki
   Rapid Terahertz Imaging of Carrier Density of 3C-SiC
   Materials Science Forum Vol. 725, pp. 57-60, July (2012)
7. Masae Takahashi, Yoichi Ishikawa Hiromasa Ito
   The dispersion correction and weak-hydrogen-bond network in low-frequency vibration of solid-state salicylic acid
   Chemical Physics Letters 531 98–104, Apr. (2012)
8. Shin'ichiro Hayashi, Koji Nawata, Hiroshi Sakai, Takunori Taira, Hiroaki Minamide, and Kodo Kawase
   High-power, single-longitudinal-mode terahertz-wave generation pumped by a microchip Nd:YAG laser
   Optics express, Vol. 20 Issue 3, pp.2881-2886, (2012)
9. Takashi Notake, Kouji Nawata, Hiroshi Kawamata, Takeshi Matsukawa, Hiroaki Minamide
   Solution growth of high-quality organic N-benzyl-2-methyl-4-nitroaniline crystal for ultra-wideband tunable DFG-THz source
   Optical Materials Express, Vol. 2, Issue 2, pp.119-125, (2012)