Femtosecond Spectroscopy Unit (Keshav Dani)
23 Mar 2020 - 14:33
At low exciton density, interactions only occur in 1D, along the favorable direction. At high exciton density, interactions occur in 2D, along both directions.
23 Mar 2020 - 13:39
For exciton-exciton annihilation to occur, two excitons must interact with each other. These interactions are well-characterized for 1D and 2D systems. In a 1D system, we can think of exciton...
26 Sep 2018 - 11:13
Using a combination of femtosecond spectroscopy with electron microscopy techniques, the flow of electrons on femtosecond timescales was tracked. First, an ultrafast laser beam was used to excite the...
26 Sep 2018 - 09:27
The prevalence of electronic devices has transformed life in the 21st century. At the heart of these devices is the movement of electrons across materials. Scientists today continue to discover...
Type: News Article
25 Sep 2018 - 17:36
From left –Dr. Michael Man, Dr. Julien Madéo, Mr. Vivek Pareek, Dr. E Laine Wong, Prof. Keshav Dani, and Mr. Andrew Winchester.
25 Sep 2018 - 17:30
Scientists combined femtosecond spectroscopy and electron microscopy techniques to observe the motion of the electrons in both short time and spatial scales.
10 Jan 2017 - 14:41
In the past decade, two-dimensional, 2D, materials have captured the fascination of a steadily increasing number of scientists. These materials, whose defining feature is having a thickness of only...
Type: News Article
10 Jan 2017 - 14:32
Dr. Bala Murali Krishna (left) and Christopher Petoukhoff from the Femtosecond Spectroscopy Unit
10 Jan 2017 - 14:28
This figure depicts the organic semiconductor, in this case P3HT:PCBM in red, with a 2D MoS2 layer on a silver plasmonic metasurface.
10 Jan 2017 - 14:26
This schematic depicts the 2D layer of MoS2 used in research experiments from the Femtosecond Spectroscopy Unit. As seen here, the layer is only three atoms thick, yet demonstrates amazing...
11 Oct 2016 - 00:00
Ever since J.J. Thompson’s 1897 discovery of the electron, scientists have attempted to describe the subatomic particle’s motion using a variety of different means. Electrons are far too small and...
Type: Press release
10 Oct 2016 - 00:00
Members of the Femtosecond Spectroscopy Unit at OIST in action. Dr. Bala Murali Krishna Mariserla, Dr. Julien Madéo, Athanasios Margiolakis, Dr. Michael Man, and Skylar Deckoff-Jones