大阪大学 · 工学
Kana Fujioka教授の研究室では、酸化物半導体やスピンオーバーラップ酸化物を対象に、電子相関効果や電子状態の精密な解明を目的とした光電子分光およびX線吸収スペクトロスコピーを用いた第一原理計算と一体的な研究を展開しています。特に、スピン・トラニッション・オーバーラップ酸化物SrRuO₃における電子相関の影響を、実験と理論の一致・乖離から解明しています。また、非線形光学結晶（KDP/DKDP）の光学的特性と同位体置換の影響についても、超広帯域位相一致の実現に向けた基礎的研究を進めています。
Figures are computed from collected data and may differ slightly.
We have measured photoemission and oxygen $1s$ x-ray absorption spectra of the ferromagnetic metal ${\mathrm{SrRuO}}_{3}$ and compared them with a first-principles band-structure calculation. The overall distribution of Ru $4d$ and O $2p$ spectral weight is in good agreement with that predicted by the band-structure calculation. However, the observed spectral line shape of the Ru $4d$ band is spread over a wide energy range and the emission intensity at the Fermi level is weakened compared to th
The refractive index of a potassium dihydrogen phosphate (KDP) crystal strongly depends on the deuteration fraction of the crystal. The wavelength dependence of the phase-matching angle in the near-infrared optical parametric process shows convex and concave characteristics for pure KDP and pure deuterated KDP (DKDP), respectively, when pumped by the second harmonic of Nd- or Yb-doped solid state lasers. Using these characteristics, ultra-broadband phase matching can be realized by optimization
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