Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Wonhyuk Jo"'
Autor:
Wojciech Roseker, Rustam Rysov, Wonhyuk Jo, Taito Osaka, André Philippi-Kobs, Leonard Müller, Matthias Riepp, Michael Walther, Alexey Zozulya, Lars Bocklage, Felix Lehmkühler, Fabian Westermeier, Daniel Weschke, Michael Sprung, Ichiro Inoue, Makina Yabashi, Gerhard Grübel
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-8 (2024)
Abstract We report on the feasibility of Fourier transform holography in the hard X-ray regime using a Free Electron Laser source. Our study shows successful single and multi-pulse holographic reconstructions of the nanostructures. We observe beam-in
Externí odkaz:
https://doaj.org/article/7397eb71f329497195f0f3ea508524d8
Autor:
Ulrike Boesenberg, Gabriele Ansaldi, Alexander Bartmann, Lewis Batchelor, Felix Brausse, Jörg Hallmann, Wonhyuk Jo, Chan Kim, Birthe Klein, Iker Lobato, Wei Lu, Johannes Möller, Ilia Petrov, Angel Rodriguez-Fernandez, Andreas Schmidt, Markus Scholz, Roman Shayduk, Konstantin Sukharnikov, Alexey Zozulya, Anders Madsen
Publikováno v:
Journal of Synchrotron Radiation, Vol 31, Iss 3, Pp 596-604 (2024)
The Materials Imaging and Dynamics (MID) instrument at the European X-ray Free-Electron Laser Facility (EuXFEL) is equipped with a multipurpose diagnostic end-station (DES) at the end of the instrument. The imager unit in DES is a key tool for aligni
Externí odkaz:
https://doaj.org/article/e336a82d0f7d4bc088adcb171e964cac
Autor:
Wonhyuk Jo, Jungyun Kee, Kooktea Kim, Eric C. Landahl, Grace Longbons, Donald A. Walko, Haidan Wen, Dong Ryeol Lee, Sooheyong Lee
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-10 (2022)
Abstract Scattering of energetic charge carriers and their coupling to lattice vibrations (phonons) in dielectric materials and semiconductors are crucial processes that determine the functional limits of optoelectronics, photovoltaics, and photocata
Externí odkaz:
https://doaj.org/article/b4f5abac64384946be2bacfb2a099bd2
Autor:
Joohyun Lee, Wonhyuk Jo, Ji-Hwan Kwon, Bruce Griffin, Byeong-Gwan Cho, Eric C. Landahl, Sooheyong Lee
Publikováno v:
Materials, Vol 16, Iss 23, p 7450 (2023)
The precise control and understanding of heat flow in heterostructures is pivotal for advancements in thermoelectric energy conversion, thermal barrier coatings, and efficient heat management in electronic and optoelectronic devices. In this study, w
Externí odkaz:
https://doaj.org/article/b195cbb7275247f68a1540c977bc0d34
Nanosecond X-ray photon correlation spectroscopy using pulse time structure of a storage-ring source
Autor:
Wonhyuk Jo, Fabian Westermeier, Rustam Rysov, Olaf Leupold, Florian Schulz, Steffen Tober, Verena Markmann, Michael Sprung, Allesandro Ricci, Torsten Laurus, Allahgholi Aschkan, Alexander Klyuev, Ulrich Trunk, Heinz Graafsma, Gerhard Grübel, Wojciech Roseker
Publikováno v:
IUCrJ, Vol 8, Iss 1, Pp 124-130 (2021)
X-ray photon correlation spectroscopy (XPCS) is a routine technique to study slow dynamics in complex systems at storage-ring sources. Achieving nanosecond time resolution with the conventional XPCS technique is, however, still an experimentally chal
Externí odkaz:
https://doaj.org/article/c91615ae3c924a1dabc47e966a254595
Publikováno v:
Crystals, Vol 11, Iss 2, p 186 (2021)
We investigate the effect of free carrier dynamics on heat transport in bulk crystalline Silicon following femtosecond optical excitation of varying fluences. By taking advantage of the dense 500 MHz standard fill pattern in the PLS-II storage ring,
Externí odkaz:
https://doaj.org/article/123549aa202247d2a4ce7bec81283b43
Autor:
Sooheyong Lee, Wonhyuk Jo, Anthony D. DiChiara, Timothy P. Holmes, Stephen Santowski, Yong Chan Cho, Eric C. Landahl
Publikováno v:
Applied Sciences, Vol 9, Iss 22, p 4788 (2019)
Photogeneration of excess charge carriers in semiconductors produces electronic strain. Under transient conditions, electron-hole pairs may be separated across a potential barrier. Using time-resolved X-ray diffraction measurements across an intrinsi
Externí odkaz:
https://doaj.org/article/b76cc8e7fe2640c4ab9912553480bf0f
Autor:
Patrick Duchstein, Dirk Zahn, Yong-jae Kim, Yong Chan Cho, Hyerim Hwang, Yun-Hee Lee, Geun Woo Lee, Seongheun Kim, Wonhyuk Jo, Sooheyong Lee
Publikováno v:
Chemical Science
For over two decades, NaCl nucleation from a supersaturated aqueous solution has been predicted to occur via a two-step nucleation (TSN) mechanism, i.e., two sequential events, the formation of locally dense liquid regions followed by structural orde
Publikováno v:
Current Applied Physics. 18:1230-1234
We report a new method of measuring the non-radiative recombination rate in bulk Silicon. Synchrotron time-resolved x-ray scattering (TRXS) combines femtometer spatial sensitivity with nanosecond time resolution to record the temporal evolution of a
Autor:
Wonhyuk Jo, Timothy P. Holmes, Yong Chan Cho, Anthony DiChiara, Eric C. Landahl, Sooheyong Lee, Stephen Santowski
Publikováno v:
Applied Sciences, Vol 9, Iss 22, p 4788 (2019)
Applied Sciences
Volume 9
Issue 22
Applied Sciences
Volume 9
Issue 22
Photogeneration of excess charge carriers in semiconductors produces electronic strain. Under transient conditions, electron-hole pairs may be separated across a potential barrier. Using time-resolved X-ray diffraction measurements across an intrinsi