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Creating the future by advanced photonics of quantum materials

Ultrafast Spectroscopy Group

Current technologies for high-speed communications and data processing, which are utilized in your smartphones, are indispensable for our daily life and also for more global issues such as energy and environmental problems. Advanced photon technology such as optical communications and optical computers are responsible for the future development of the communication/processing technologies.

According to the Old Testament, light has existed since the first day of the creation (Let light there be). However, recent innovation of light causes drastic changes which have never been realized (i.e., blue LED, optical frequency comb, terahertz technology and attosecond X-ray etc…). On the other hand, “quantum materials” such as high-Tc superconductors, quantum spin liquids, topological materials and multiferroics attract much attention because of their amazing electric and magnetic natures.

Fig1_J

Upper panel: Optical responses of quantum materials. High-harmonic generation in a superconductor (left). Light-induced magnetization induced by a spiral current in a spin liquid (right).
Lower panel: Setup of ultrafast spectroscopy.

In ultrafast spectroscopy lab. we challenge the creation of innovative photonics of the quantum materials. Capturing and manipulating dynamics of correlated electrons in attosecond time scale can open the way to petahertz (which is 103 -106 times faster than current one) operations of electronics and spintronics.

Link

http://femto.phys.tohoku.ac.jp/about/projects.html
http://www.tohoku.ac.jp/japanese/2018/06/press20180626-02.html
https://www.tohoku.ac.jp/japanese/2020/08/press20200819-01-peta.html

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