Zobrazeno 1 - 10
of 97
pro vyhledávání: '"Zhi-Heng Loh"'
Autor:
Pei Jiang Low, Weibin Chu, Zhaogang Nie, Muhammad Shafiq Bin Mohd Yusof, Oleg V. Prezhdo, Zhi-Heng Loh
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-9 (2022)
A unified picture of the electronic relaxation dynamics of ionized liquid water remains elusive despite decades of study. Here, the authors use few-cycle optical pump-probe spectroscopy and ab initio quantum dynamics to unambiguously identify a new t
Externí odkaz:
https://doaj.org/article/015356578ddf460ea50af61fc1c9f593
Autor:
Thomas Ding, Marc Rebholz, Lennart Aufleger, Maximilian Hartmann, Veit Stooß, Alexander Magunia, Paul Birk, Gergana Dimitrova Borisova, David Wachs, Carina da Costa Castanheira, Patrick Rupprecht, Yonghao Mi, Andrew R. Attar, Thomas Gaumnitz, Zhi-Heng Loh, Sebastian Roling, Marco Butz, Helmut Zacharias, Stefan Düsterer, Rolf Treusch, Arvid Eislage, Stefano M. Cavaletto, Christian Ott, Thomas Pfeifer
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-7 (2021)
Free-electron laser pulses generated from self-amplification of spontaneous emission scheme vary from one another in their characteristics. Here the authors demonstrate a transient absorption spectroscopy method to characterize the frequency chirp of
Externí odkaz:
https://doaj.org/article/5f83b3159f934697a663565c3a380fd6
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-8 (2019)
The interaction of biomolecules with ionizing radiation induces structural changes which are still largely unknown. The authors use femtosecond wave packet spectroscopy to observe ultrafast structural dynamics that follow the photodetachment of pheno
Externí odkaz:
https://doaj.org/article/25fdb9fa8f2f44bc8cfa0b67e6bfc862
Autor:
Marc Rebholz, Thomas Ding, Victor Despré, Lennart Aufleger, Maximilian Hartmann, Kristina Meyer, Veit Stooß, Alexander Magunia, David Wachs, Paul Birk, Yonghao Mi, Gergana Dimitrova Borisova, Carina da Costa Castanheira, Patrick Rupprecht, Georg Schmid, Kirsten Schnorr, Claus Dieter Schröter, Robert Moshammer, Zhi-Heng Loh, Andrew R. Attar, Stephen R. Leone, Thomas Gaumnitz, Hans Jakob Wörner, Sebastian Roling, Marco Butz, Helmut Zacharias, Stefan Düsterer, Rolf Treusch, Günter Brenner, Jonas Vester, Alexander I. Kuleff, Christian Ott, Thomas Pfeifer
Publikováno v:
Physical Review X, Vol 11, Iss 3, p 031001 (2021)
In this work, we use an extreme-ultraviolet (XUV) free-electron laser (FEL) to resonantly excite the I: 4d_{5/2}–σ^{*} transition of a gas-phase di-iodomethane (CH_{2}I_{2}) target. This site-specific excitation generates a 4d core hole located at
Externí odkaz:
https://doaj.org/article/64b424a18119400eb2c7746afff63f50
Autor:
Zhengrong Wei, Jialin Li, Lin Wang, Soo Teck See, Mark Hyunpong Jhon, Yingfeng Zhang, Fan Shi, Minghui Yang, Zhi-Heng Loh
Publikováno v:
Nature Communications, Vol 8, Iss 1, Pp 1-7 (2017)
Nuclear dynamics of polyatomic molecules involves multiple degrees of freedom and is challenging to explore. Here the authors study the internuclear distance-dependent depletion and bond-softening induced vibrational wavepacket dynamics of CH3I molec
Externí odkaz:
https://doaj.org/article/a399aba689a448c0b7e85f27323a4c61
Autor:
Ronald Ulbricht, Shuo Dong, I-Ya Chang, Bala Murali Krishna Mariserla, Keshav M. Dani, Kim Hyeon-Deuk, Zhi-Heng Loh
Publikováno v:
Nature Communications, Vol 7, Iss 1, Pp 1-6 (2016)
Understanding ultrafast dynamics of excited states of nitrogen-vacancy helps its manipulation for technological applications. Here the authors use polarization anisotropy spectroscopy and molecular dynamics to investigate sub-picosecond dephasing dyn
Externí odkaz:
https://doaj.org/article/a916f54c79b64e0293464b27a268f30d
Autor:
Zhi-Heng Loh
Publikováno v:
IEEE Photonics Journal, Vol 5, Iss 2, Pp 0700304-0700304 (2013)
Advances in strong-field laser physics and ultrafast optics allow the study of ultrafast dynamics on electronic time scales. Here, recent developments from the past year in the field of attosecond electron dynamics are highlighted.
Externí odkaz:
https://doaj.org/article/3a2115600ecc47cb9a3cf7d7a5fd8cb3
Autor:
Muhammad Shafiq Bin Mohd Yusof, Hongwei Song, Tushar Debnath, Bethany Lowe, Minghui Yang, Zhi-Heng Loh
Publikováno v:
Physical Chemistry Chemical Physics. 24:12236-12248
Proton transfer (PT) reactions are fundamental to numerous chemical and biological processes. While sub-picosecond PT involving electronically excited states has been extensively studied, little is known about ultrafast PT triggered by photoionizatio
Autor:
Lennart Aufleger, Rolf Treusch, Maximilian Hartmann, Thomas Pfeifer, Marco Butz, Veit Stooß, David Wachs, Paul Birk, Helmut Zacharias, Carina da Costa Castanheira, Thomas Ding, Zhi-Heng Loh, Marc Rebholz, Stefan Düsterer, Gergana Dimitrova Borisova, Yonghao Mi, Arvid Eislage, Alexander Magunia, Patrick Rupprecht, S. Roling, Andrew R. Attar, Christian D. Ott, Stefano M. Cavaletto, Thomas Gaumnitz
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-7 (2021)
Nature Communications
Nature Communications 12(1), 643 (1-7) (2021). doi:10.1038/s41467-020-20846-1
Nature Communications
Nature Communications 12(1), 643 (1-7) (2021). doi:10.1038/s41467-020-20846-1
Nature Communications 12(1), 643 (1-7) (2021). doi:10.1038/s41467-020-20846-1
High-intensity ultrashort pulses at extreme ultraviolet (XUV) and x-ray photon energies, delivered by state-of-the-art free-electron lasers (FELs), are revolutionizing
High-intensity ultrashort pulses at extreme ultraviolet (XUV) and x-ray photon energies, delivered by state-of-the-art free-electron lasers (FELs), are revolutionizing
Publikováno v:
Physical chemistry chemical physics : PCCP. 24(5)
The phenylalanine radical (Phe˙) has been proposed to mediate biological electron transport (ET) and exhibit long-lived electronic coherences following attosecond photoionization. However, the coupling of ultrafast structural reorganization to the o