NAIST Graduate School of Materials Science

Quantum Materials Science Laboratory

Staff & Contact
Educational StaffProf. Hisao Yanagi
Associate Prof. Hiroyuki Katsuki
Assistant Prof. Atsushi Ishizumi, Satoshi Tomita
Contact
TEL: +81-743-72-6011
URLhttp://mswebs.naist.jp/LABs/optics/eng/index-e.html

Electrons, when confined in a nanometer-sized space (1 nanometer = 10-9 m), remarkably begin to behave like waves. For example, an organic molecule can be considered as a quantum state in which electrons are confined in a nm space consisting of atoms connected together. Semiconductor nanoparticles show colors different from those of bulk solids due to the quantum size effect. The Quantum Materials Science Laboratory studies molecules, crystals, nanoparticles, and ultrathin films of both organic and inorganic materials, utilizes various optics-based experimental approaches to clarify material properties from the viewpoint of quantum physics, and aims to create new functional materials that can be used in optical information-communication or environment-conscious devices in the future.

By controlling molecular alignment and crystal growth, we are aiming to realize organic lasers and efficient organic solar cells.

We are trying to control and observe quantum coherence in molecular crystals of p-H2 and organic semiconductors by using ultrafast laser spectroscopy.

We are working on the optical functionality of nanostructured materials such as environment-conscious nanoparticles and impurity-doped nanoparticles.

By assigning distinct functions to different artificial units much smaller than the wavelengths of light, we are trying to create artificial materials (metamaterials) mimicking an intriguing property for light.

  • Fig.1 Molecular crystal-based organic laser
  • Fig.2 Crystal growth of p-H2
  • Fig.3 Luminescence from impuritydoped semiconductor nanoparticles
  • Fig.4 TMV/gold nanoparticle complexes

H. Mizuno, T. Maeda, H. Yanagi, H. Katsuki, M. Aresti, F. Quochi, M. Saba, A. Mura, G. Bongiovanni, F. Sasaki, and S. Hotta, Adv. Opt. Mater. 2(6), 529 (2014).
H. Katsuki, Y. Kayanuma, and K. Ohmori, Phys. Rev. B 88, 014507 (2013).
A. Ishizumi, S. Fujita, and H. Yanagi, Opt. Mater. 33, 1116 (2011).
S. Tomita, K. Sawada, A. Porokhnyuk, and T. Ueda, Phys. Rev. Lett. 113, 235501 (2014)

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