Femtosecond Spectroscopy Unit (Keshav Dani)

News & Highlights

• Sep. 15: Sonya's paper on varied nature and roles of defects in hybrid perovskites published online as an Advanced Article in Energy & Environmental Science.
• Sep. 1: Our collaborative work led by the group Prof. Yoshinori Okada on superconductivity in doped Weyl semimetals published in Physical Review B.
• Jul. 30: Our collaborative work led by the group of Prof. Fumiaki Miyamaru demonstrating frequency conversion at the temporal boundary in the THz region published in Physical Review Letters.
• Jul. 5: Topical review of trends in ultrafast spectroscopy of condensed matter published in Journal of Physics: Condensed Matter including our contribution towards time-resolved photoemission spectroscopies.
• May 24: Our review on high field terahertz generation with lithium niobate published in Photonics.
• Apr. 27: Our review on photoconductive terahertz emitters published in the Journal of Optics.
• Apr. 21: Our work on imaging the distribution of the electron around the hole in an exciton was published in Science Advances.
• Apr. 20: Our collaborative work studying high-harmonic generation in black phosphorus, led by Tanaka group published in PRB.
• Feb. 4: Joel's paper on THz patch antenna microcavities lasers published in ACS Photonics.
• Feb. 1: Julien's paper on directly visualizing momentum-forbidden dark excitons and their dynamics featured in Physics Today.

Archive of News & Highlights

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, we have pursued three broad areas of study:

1. Exploring next-generation terahertz sources;
2. Opto-electronic phenomena in van der Waals heterostructures; and
3. Interdisciplinary endeavours with OIST colleagues.

Please click on the 'Research' tab to learn more about each area.

You can also learn more about our suite of experimental capabilities in the 'Laboratories' tab, along with brief tutorials of the basic techniques that we use in the 'Experimental Techniques' tab.

What does the Femtosecond Spectroscopy Unit do?

Femtosecond Spectroscopy Unit from OIST on Vimeo.