Conveners
[BS5] Ultrafast imaging and structural dynamics: advances and applications
- Hyo Jung Kim (Pusan National University)
Description
High-resolution imaging and analysis tools such as electron microscopy and diffraction, X-ray microscopy and diffraction, and various spectroscopes have ushered in a new era of nanoscience and nanotechnology. As the size of an object decreases, the time scale of its dynamics becomes increasingly faster. Understanding the ultrafast dynamics of matter will contribute to improving the physicochemical properties and long-term stability of matter. Recently developed pulsed optical laser, electron, and X-ray sources allow for the discovery of ultrafast electronic and atomic dynamics. In this session, we will discuss various pump-probe techniques, time-resolved experiments and their applications.
Understanding and control of photon-induced dynamics of molecules on solid surfaces are of essential importance for surface chemistry as well as for design of novel devices. Here, such a multiview experiment is realized by integrating four modalities of time-resolved photoelectron spectroscopy—time-resolved orbital tomography, trARPES, trXPS, and trXPD—using ultrashort-pulsed extreme...
In-situ transmission electron microscopy (in-situ TEM) is a powerful technique to observe a wide variety of phenomena that occur at the nanoscale. In-situ TEM experiments can use various stimuli, such as heating, biasing, tensioning, lighting, gas, liquid, cryo, and magnetic fields. With these stimuli, researchers have investigated particle agglomeration, oxidation and reduction, and...
Optical laser speckle correlation techniques opened up the possibility of studying diffusive dynamics in randomly distributed systems. Thanks to the improvement of large-scale X-ray generation facilities, a high flux of coherent X-rays enables us to collect a sufficient intensity of X-ray speckle images and has extended the spatial resolution to atomic scales [1]. Conventional X-ray Photon...
Terahertz (THz = 1012 Hz) spectroscopy is a promising analytical technique for non-destructive, highly accurate investigation. Since THz time- domain spectroscopy measures both amplitude and phase of transmission through materials, which can be used to extract the spectral shape of the conductivity spectrum, and THz pulses can act as ultrafast probes of intraband excitations of materials, it...
