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{\Large \bf Solid State Photophysics Group}\\
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Professor &:&Teruya~Ishihara \\
Assistant Professor &:&Masanobu~Iwanaga\\
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(http://www.sspp.phys.tohoku.ac.jp/)\\

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Light-matter interaction played an essential role 
at the birth of quantum mechanics. 
By combining the progresses of materials sciences, 
nanofabrication and ultrafast laser techniques, 
it may now be possible to open new physics. 
At the moment, we are focusing on the three objects below:

1) \textbf{Photonic crystals}: 
Photonic crystal is a periodic array of dielectrics 
in the scale of light wavelength. 
Recently extensive research works have been done aiming at applications to optical devices, while we are interested in new physics in such systems. 
By using ultra fine fabrication techniques, 
we realize unconventional electromagnetic environment, 
where interactions with excitons in semiconductor and plasmons in metal 
may lead to exotic phenomena.

2) \textbf{Inorganic-organic hybrid compounds}: Research works on optical properties of leadiodide-based inorganic-organic compounds have been initiated in this lab. Reflecting special dielectric structure, excitons are stable even at room temperature.

3)\textbf{Optical nonlinear phenomena}: 
It is one of the advantages of ultra fast lasers, 
that the material is set to the extremely high excitation state 
without damaging the sample. 
Under such condition it may form new phases, 
of which dynamics can be traced with the nonlinear spectroscopic techniques.
 
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