News & Highlights
- 2026 Jan 19: Our paper on driving Floquet physics with excitonic fields has been published in Nature Physics.
- 2026 Jan 3: Our work on phenol degradation using TiO₂ photocatalysts with dual sensitizer (Nd³⁺/Yb³⁺) has been published in Applied Surface Science.
- 2025 Oct 23: Our work on Studying EDAI passivation of perovskite photovoltaic materials using PEEM now published in Ultramicroscopy. Congratulation to everyone involved.
- 2025 Oct 08: Takumi's paper on Interlayer shear phonons in lattice symmetry switching in TMDCs now published in Physical Review B. Congratulation!
- 2025 Jul 10: Our paper on A holistic view of the dynamics of long-lived valley polarized dark excitonic states in monolayer WS2 published in Nature Communications. Congratulations to everyone involved.
- 2025 Jun 19: Julien and Keshav wrote a News & Views in Nature Physics on the observation of Floquet states in graphene.
More news and highlightsResearch 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.
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:
- Excitons in Momentum Space
- Defects in Perovskite photovoltaics
- Emerging Technologies with extreme light
- Intra-OIST Research
OIST Center for Quantum Technologies
This unit is a member of the OIST Center for Quantum Technologies (OCQT)
We are pleased to announce that our unit will co-organize the 14th International Conference on LEEM/PEEM (LEEM/PEEM-14), to be held October 5–9, 2026 in Tokyo, Japan.
