Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Seunghwoi Han"'
Autor:
Jie Li, Jian Lu, Andrew Chew, Seunghwoi Han, Jialin Li, Yi Wu, He Wang, Shambhu Ghimire, Zenghu Chang
Publikováno v:
Nature Communications, Vol 11, Iss 1, Pp 1-13 (2020)
Different methods are demonstrated in recent years to produce attosecond pulses. Here, the authors discuss recent development and future prospects of the generation of such pulses from gases and solids and their potential applications in spectroscopy
Externí odkaz:
https://doaj.org/article/d691d80691394000afeb8024a3ce40b4
Publikováno v:
Sensors, Vol 22, Iss 19, p 7513 (2022)
Electron correlation describes the interaction between electrons in a multi-electron system. It plays an important role in determining the speed of relaxation of atoms and molecules excited by XUV/X-ray pulses, such as the argon decay rate. Most rese
Externí odkaz:
https://doaj.org/article/da2c624ca3e34565a42b109832b3a0bf
Autor:
Seunghwoi Han, Lisa Ortmann, Hyunwoong Kim, Yong Woo Kim, Takashi Oka, Alexis Chacon, Brent Doran, Marcelo Ciappina, Maciej Lewenstein, Seung-Woo Kim, Seungchul Kim, Alexandra S. Landsman
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-6 (2019)
Characterizing higher order nonlinearities and responses to optical excitations in materials is challenging. Here, the authors use high harmonic generation in sapphire crystals to extract higher order susceptibilities and characterize the nonlinear e
Externí odkaz:
https://doaj.org/article/96b355a2703746e39a5b2363579ea59a
Autor:
Seunghwoi Han
Publikováno v:
Photonics, Vol 9, Iss 6, p 427 (2022)
High-harmonic generation (HHG) from solids is a novel method used to emanate coherent extreme-ultraviolet (EUV) pulses. The efficiency of plasmonic HHG can be improved by enhancing the field of nanostructures. However, the nanostructures used for pla
Externí odkaz:
https://doaj.org/article/e9957afe338547a2b43277c505e66d54
Autor:
Nariyuki Saito, Nicolas Douguet, Hiroki Sannohe, Nobuhisa Ishii, Teruto Kanai, Yi Wu, Andrew Chew, Seunghwoi Han, Barry I. Schneider, Jeppe Olsen, Luca Argenti, Zenghu Chang, Jiro Itatani
Publikováno v:
Physical Review Research, Vol 3, Iss 4, p 043222 (2021)
We present a combined experimental and theoretical study of the transient absorption spectroscopy of N_{2}O at the N K edge (400 eV) by employing an attosecond soft x-ray pulse and an overlapping intense femtosecond infrared pulse. Our experiment dem
Externí odkaz:
https://doaj.org/article/6343e70b28e64d68a07478fda180bb89
Autor:
Seunghwoi Han, Hyunwoong Kim, Yong Woo Kim, Young-Jin Kim, Seungchul Kim, In-Yong Park, Seung-Woo Kim
Publikováno v:
Nature Communications, Vol 7, Iss 1, Pp 1-7 (2016)
It has been suggested that strong field enhancement for high harmonic generation may be achievable with nano-antennas. Here, the authors show relevant field enhancement using a metal-sapphire nanostructure that provides a solid tip as the high harmon
Externí odkaz:
https://doaj.org/article/0a85ba1edfc943e0a9d2ee929119ffd9
Publikováno v:
New Journal of Physics, Vol 14, Iss 10, p 103038 (2012)
We theoretically investigated the possibility of generating attosecond pulses by means of plasmonic field enhancement induced in a nano-structured metallic funnel-waveguide. This study was motivated by our recent experimental demonstration of ultrash
Externí odkaz:
https://doaj.org/article/165312cfb2b8425bad474641aeec091d
Autor:
Seungman Kim, Seongheum Han, Jae Seung Lim, Sumin Kang, Seunghwoi Han, Jae-Hak Lee, Ah-Young Park, Jun-Yeob Song
Publikováno v:
Advances in Display Technologies XIII.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::73d6f7f4cefc9a723460c8f9817af9cd
https://doi.org/10.1117/12.2648046
https://doi.org/10.1117/12.2648046
Autor:
Nariyuki Saito, Nicolas Douguet, Nobuhisa Ishii, Teruto Kanai, Yi Wu, Andrew Chew, Seunghwoi Han, Barry I. Schneider, Jeppe Olsen, Luca Argenti, Zenghu Chang, Jiro Itatani
Publikováno v:
The International Conference on Ultrafast Phenomena (UP) 2022.
Half-cycle oscillation is observed in transient absorption spectra of N2O at N K edge (400 eV) irradiated by intense IR pulses, which is attributed to tunneling ionization of core excited states by intensive TDSE-based simulation.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8f1f4cdac405d7b3dcc1063268ebb66d
https://doi.org/10.1364/up.2022.w1a.3
https://doi.org/10.1364/up.2022.w1a.3
Autor:
Seunghwoi Han
Publikováno v:
Asian Society for Precision Engineering and Nanotechnology (ASPEN 2022).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8ae5ed4db0a0548b2eb82b84f511e5d3
https://doi.org/10.3850/978-981-18-6021-8_or-15-0050.html
https://doi.org/10.3850/978-981-18-6021-8_or-15-0050.html