Zobrazeno 1 - 10
of 65
pro vyhledávání: '"Thomas K, Allison"'
Autor:
Christopher Corder, Peng Zhao, Jin Bakalis, Xinlong Li, Matthew D. Kershis, Amanda R. Muraca, Michael G. White, Thomas K. Allison
Publikováno v:
Structural Dynamics, Vol 5, Iss 5, Pp 054301-054301-16 (2018)
Time- and Angle-resolved photoelectron spectroscopy from surfaces can be used to record the dynamics of electrons and holes in condensed matter on ultrafast time scales. However, ultrafast photoemission experiments using extreme-ultraviolet (XUV) lig
Externí odkaz:
https://doaj.org/article/b57fcd047d604affbc77e1f2e9d4ffb2
Autor:
Alice Kunin, Sergey Chernov, Jin Bakalis, Ziling Li, Shuyu Cheng, Zachary H. Withers, Michael G. White, Gerd Schönhense, Xu Du, Roland K. Kawakami, Thomas K. Allison
Coupling between exciton states across the Brillouin zone in monolayer transition metal dichalcogenides can lead to ultrafast valley depolarization. Using time- and angle-resolved photoemission, we present momentum- and energy-resolved measurements o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::43ae117dabb7a6bacb7a74a38be2198b
http://arxiv.org/abs/2203.02419
http://arxiv.org/abs/2203.02419
Autor:
Thomas K. Allison
Publikováno v:
EPJ Web of Conferences, Vol 205, p 03015 (2019)
We describe methods using frequency combs and cavities for recording two-dimensional ultrafast spectroscopy signals with high sensitivity. By coupling multiple frequency combs to modes of an optical resonator, cavity-enhanced 2D spectroscopy signals
Externí odkaz:
https://doaj.org/article/499fcb19e3324d5888a0cb265a56f217
Autor:
Grzegorz Kowzan, Thomas K. Allison
Publikováno v:
The International Conference on Ultrafast Phenomena (UP) 2022.
Recent technological developments are enabling highly sensitive measurements of high-resolution 2D IR gas-phase spectra. In analogy to well-known liquid-phase results, we present polarization sequences that reduce spectral congestion and improve sign
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::875fcd3684299cf5602a71b6ed12a2ad
https://doi.org/10.1364/up.2022.w4a.28
https://doi.org/10.1364/up.2022.w4a.28
Autor:
Alice Kunin, Sergey Chernov, Jin Bakalis, Ziling Li, Shuyu Cheng, Zachary H. Withers, Michael G. White, Gerd Schönhense, Xu Du, Roland K. Kawakami, Thomas K. Allison
Publikováno v:
The International Conference on Ultrafast Phenomena (UP) 2022.
Using time-resolved angle-resolved photoemission spectroscopy (tr-ARPES), we image the dynamics of intervalley and intravalley excitons in monolayer WS2. We observe strong coupling between photoexcited B and A excitons and directly visualize the ultr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a5424a9cf70f8739e22ff8cc91615ed
https://doi.org/10.1364/up.2022.m2b.1
https://doi.org/10.1364/up.2022.m2b.1
Autor:
Sergey Chernov, Jin Bakalis, Alice Kunin, Zachary H. Withers, Michael G. White, Gerd Schönhense, Thomas K. Allison
Publikováno v:
The International Conference on Ultrafast Phenomena (UP) 2022.
We study the applicability of momentum microscopy for pump-probe angle-resolved photoemission studies at high repetition rate. We discuss strategies for the mitigation of detector saturation and space charge to enable high-performance measurements.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f795c8f5b402ffbc1db7de15810eda8
https://doi.org/10.1364/up.2022.w4a.41
https://doi.org/10.1364/up.2022.w4a.41
Publikováno v:
The International Conference on Ultrafast Phenomena (UP) 2022.
We study ultrafast excited-state proton transfer and subsequent internal conversion in salicylideneaniline using broadband cavity-enhanced transient absorption spectroscopy. By comparing gas-phase optical spectra to solution-phase spectra and ab init
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a82f455a41dbcfbd34fee710100bee28
https://doi.org/10.1364/up.2022.f2a.4
https://doi.org/10.1364/up.2022.f2a.4
Autor:
Jay Rutledge, Anthony Catanese, Daniel D. Hickstein, Thomas K. Allison, Scott A. Diddams, Abijith S. Kowligy
Publikováno v:
The International Conference on Ultrafast Phenomena (UP) 2022.
We report efficient, phase-coherent high-harmonic generation in chirped periodically poled lithium niobate waveguides pumped with a watt-scale 3 µm frequency comb. Simulations support a mechanism of cascaded quadratic nonlinearity and provide insigh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e07378c8dfcada48d0cf3b674d2c551
https://doi.org/10.1364/up.2022.w4a.33
https://doi.org/10.1364/up.2022.w4a.33
Autor:
Jin Bakalis, Sergey Chernov, Alice Kunin, Ziling Li, Shuyu Cheng, Roland K. Kawakami, Xu Du, Michael G. White, Gerd Schönhense, Thomas K. Allison
Publikováno v:
The International Conference on Ultrafast Phenomena (UP) 2022.
We report measurements of pump polarization-dependent anisotropy of excited electrons in graphene using time-resolved ARPES. Despite very fast relaxation in energy, the initial anisotropic distributions in momentum space persist through multiple elec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::62fa3deeb6a2e92b5112468d497a1c25
https://doi.org/10.1364/up.2022.th4a.13
https://doi.org/10.1364/up.2022.th4a.13
Publikováno v:
Proceedings of the 2021 International Symposium on Molecular Spectroscopy.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3bc070ca01d4f12e5432fdd5d33397b2
https://doi.org/10.15278/isms.2021.wb03
https://doi.org/10.15278/isms.2021.wb03