Cavity-enhanced high harmonic generation for extreme ultraviolet time- and angle-resolved photoemission spectroscopy.
Arthur K. Mills,Sergey Zhdanovich,MengXing Na,Fabio Boschini,Elia Razzoli,Matteo Michiardi,Matteo Michiardi,Alexander Sheyerman,Michael Schneider,T. J. Hammond,Vicky Süss,Claudia Felser,Andrea Damascelli,David J. Jones +13 more
TLDR
This work identifies a practical source for TR-ARPES that achieves a flux of over 1011 photons/s delivered to the sample, and operates over a range of 8-40 eV with a repetition rate of 60 MHz, and addresses the challenge of achieving a high energy resolution while producing high photon energies and a high photon flux.Abstract:
With its direct correspondence to electronic structure, angle-resolved photoemission spectroscopy (ARPES) is a ubiquitous tool for the study of solids. When extended to the temporal domain, time-resolved (TR)-ARPES offers the potential to move beyond equilibrium properties, exploring both the unoccupied electronic structure as well as its dynamical response under ultrafast perturbation. Historically, ultrafast extreme ultraviolet sources employing high-order harmonic generation (HHG) have required compromises that make it challenging to achieve a high energy resolution—which is highly desirable for many TR-ARPES studies—while producing high photon energies and a high photon flux. We address this challenge by performing HHG inside a femtosecond enhancement cavity, realizing a practical source for TR-ARPES that achieves a flux of over 1011 photons/s delivered to the sample, operates over a range of 8–40 eV with a repetition rate of 60 MHz. This source enables TR-ARPES studies with a temporal and energy resolution of 190 fs and 22 meV, respectively. To characterize the system, we perform ARPES measurements of polycrystalline Au and MoTe2, as well as TR-ARPES studies on graphite.read more
Citations
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Direct determination of mode-projected electron-phonon coupling in the time domain.
MengXing Na,Arthur K. Mills,Fabio Boschini,Matteo Michiardi,Matteo Michiardi,Benjamin Nosarzewski,Ryan Day,Elia Razzoli,Alexander Sheyerman,Michael Schneider,Giorgio Levy,Sergey Zhdanovich,Thomas P. Devereaux,Alexander F. Kemper,David J. Jones,Andrea Damascelli +15 more
TL;DR: A method for extracting the electron-phonon coupling strength in the time domain, using time- and angle-resolved photoemission spectroscopy (TR-ARPES), is presented and demonstrated in graphite, where the dynamics of photoinjected electrons at the K¯ point are investigated.
Journal ArticleDOI
Time- and momentum-resolved photoemission studies using time-of-flight momentum microscopy at a free-electron laser
D. Kutnyakhov,Rui Patrick Xian,Maciej Dendzik,Michael Heber,Federico Pressacco,Steinn Ymir Agustsson,Lukas Wenthaus,Holger Meyer,S. Gieschen,Giuseppe Mercurio,Adrian Benz,Kevin Bühlman,Simon Däster,Rafael Gort,Davide Curcio,Klara Volckaert,Marco Bianchi,Charlotte E. Sanders,Jill A. Miwa,Søren Ulstrup,Andreas Oelsner,Christian Tusche,Christian Tusche,Ying-Jiun Chen,Ying-Jiun Chen,D. Vasilyev,Katerina Medjanik,Günter Brenner,Siarhei Dziarzhytski,Harald Redlin,Bastian Manschwetus,Shuo Dong,Jasper Hauer,Laurenz Rettig,Florian Diekmann,Kai Rossnagel,Jure Demsar,Hans-Joachim Elmers,Philip Hofmann,Ralph Ernstorfer,Gerd Schönhense,Yves Acremann,Wilfried Wurth +42 more
TL;DR: In this article, a full-field imaging momentum microscope with time-of-flight energy recording as the detector for mapping of 3D band structures in (kx, ky, E) parameter space with unprecedented efficiency.
Journal ArticleDOI
Nuclear clocks for testing fundamental physics
Ekkehard Peik,Thorsten Schumm,Marianna Safronova,Adriana Pálffy,Johannes Weitenberg,Johannes Weitenberg,Peter G. Thirolf +6 more
TL;DR: In this article, the authors proposed to use the nuclear resonance frequency, determined by the strong and electromagnetic interactions inside the nucleus, to build a highly precise nuclear clock that will be fundamentally different from all other atomic clocks based on resonant frequencies of the electron shell.
Journal ArticleDOI
Extreme-ultraviolet frequency combs for precision metrology and attosecond science
TL;DR: In this article, the authors review the coming of age of this technology and its recent applications and prospects, including precision frequency-comb spectroscopy of electronic and potentially nuclear transitions, and low-space-charge attosecond-temporal-resolution photoelectron spectroscopic with nearly 100% temporal detection duty cycle.
Journal ArticleDOI
Experimental measurement of the intrinsic excitonic wave function
Michael K. L. Man,Julien Madéo,Chakradhar Sahoo,Chakradhar Sahoo,Kaichen Xie,Marshall Campbell,Vivek Pareek,Arka Karmakar,E Laine Wong,Abdullah Al-Mahboob,Nicholas S. Chan,David R. Bacon,Xing Zhu,Mohamed Abdelrasoul,Xiaoqin Li,Tony F. Heinz,Tony F. Heinz,Felipe H. da Jornada,Ting Cao,Ting Cao,Keshav M. Dani +20 more
TL;DR: In this article, the authors directly image the excitonic wave function in reciprocal space by measuring the momentum distribution of electrons photoemitted from excitons in monolayer tungsten diselenide.
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