東京大学 · 物理学・天文学
伊田谷二郎教授の研究室では、超短パルスレーザーとX線を用いた量子制御を柱とした光科学の研究を行っています。特に、分子の整列制御を応用した高次高調波生成や、アト秒スケールのX線パルスの波形測定に注力しています。分子軌道の対称性が高調波の強度とスペクトルに与える影響を解明することで、時間・空間的に制御された光場の創出を目指しています。
Figures are computed from collected data and may differ slightly.
An electron generated by x-ray photoionization can be deflected by a strong laser field. Its energy and angular distribution depends on the phase of the laser field at the time of ionization. This phase dependence can be used to measure the duration and chirp of single sub100-attosecond x-ray pulses.
We show that, by controlling the alignment of molecules, we can influence the high harmonic generation process. We observed strong intensity modulation and spectral shaping of high harmonics produced with a rotational wave packet in a low-density gas of N2 or O2. In N2, where the highest occupied molecular orbital (HOMO) has sigma(g) symmetry, the maximum signal occurs when the molecules are aligned along the laser polarization while the minimum occurs when it is perpendicular. In O2, where the
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