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Research topics
Ultrafast Dynamics and Coherent Control in Condensed Matter
Dynamics of electrons, phonons and elementary excitations, which dominate physical properties of materials, occur within a short time scale faster than nanoseconds. We investigate ultrafast dynamics of carriers, spins, phonons and other quasi-particles in picosecond and femtosecond time scales using ultrafast time-resolved optical spectroscopy.
We also perform a coherent control of quantum states in a condensed matter to optically control physical properties using precisely controlled femtosecond laser pulses and study the quantum decoherence.
News topics:
1) Ruling electrons and vibrations in a crystal with polarized light
The wuantum behavior of atomic vibrations excited in a crystal using light pulses has much to do with the polarization of pulses. The findings offer a new control parameter for the manipulation od coherently excited vibtrations in solid materials at quantum level.
https://www.titech.ac.jp/english/news/2021/062098
2) A light matter: understanding the Raman dance of solids
Quantum interferometry reveals the chosen pathway of coherent phonon generation
https://www.titech.ac.jp/english/news/2019/044348
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