News & Highlights

• 2025 Jan 30: Prof. Dani has been elected as a member of Optica Fellows 2025 for his contribution on time-resolved imaging, in real- and momentum-space, of defects in perovskite photovoltaic materials and excitons in two-dimensional semiconductors.
• 2024 May 19: Our collaborative work with Shinshu University on terahertz waves down-conversion published in Nanophotonics.
• 2024 Apr 26: Our review on time-resolved photoemission electron microscopy published in Progress in Surface Science.
• 2024 Apr 24: Our collaborative work with Prof. Fumiaki Miyamaru on terahertz pulse attenuation management had been published in Physical Review Applied.
• 2023 Dec 20: Prof. Dani is one of the two OIST faculty memebers had been awarded the 2023 JSPS Prize.
• 2023 Aug 21: Prof. Dani's interview as one of the Winners of the Falling Walls Summit 2023 now online.
  

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Research Overview

The ability to manipulate and alter matter with intense light fields on very short timescales has the potential to have a transformative effect on a range of scientific and technological endeavors in the coming decades. With extremely high peak powers delivered in exceedingly brief periods of time, ultrafast pulses of light provide the perfect tools to pursue these ideas. They allow the exploration of nonlinear phenomena across broad regions of the electromagnetic spectrum, as well as the measurements of fast electron dynamics in matter. Starting with the development of a strong and unique suite of ultrafast capabilities from the ground up at OIST, and sharing OIST’s vision to pursue creative, interdisciplinary research.

The ability to synthesize, engineer & observe low dimensional materials, with properties determined by variations on the nanometer length scale has led to novel phenomena and applications. On the other hand, modern lasers deliver powerful, ultrashort pulses of light allowing us to observe the interaction of electrons and atoms on the femtosecond timescale. Together, these technologies allow us to study new paradigms in light-matter interaction – with femtosecond temporal resolution and nanometer spatial resolution. Femtosecond Spectroscopy Unit has directed these broad capabilities towards four areas of study:

1. Excitons in Momentum Space
2. Defects in Perovskite photovoltaics
3. Emerging Technologies with extreme light
4. Intra-OIST Research