Journal ArticleDOI
Angle-resolved photoemission spectroscopy with a femtosecond high harmonic light source using a two-dimensional imaging electron analyzer.
Stefan Mathias,Luis Miaja-Avila,Margaret M. Murnane,Henry C. Kapteyn,Martin Aeschlimann,Michael Bauer +5 more
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TLDR
An experimental setup for time- and angle-resolved photoemission spectroscopy using a femtosecond 1 kHz high harmonic light source and a two-dimensional electron analyzer for parallel energy and momentum detection is presented.Abstract:
An experimental setup for time- and angle-resolved photoemission spectroscopy using a femtosecond 1 kHz high harmonic light source and a two-dimensional electron analyzer for parallel energy and momentum detection is presented. A selection of the 27th harmonic (41.85 eV) from the harmonic spectrum of the light source is achieved with a multilayer MoSi double mirror monochromator. The extinction efficiency of the monochromator in selecting this harmonic is shown to be better than 7:1, while the transmitted bandwidth of the selected harmonic is capable of supporting temporal pulse widths as short as 3 fs. The recorded E(k) photoelectron spectrum from a Cu(111) surface demonstrates an angular resolution of better than 0.6 degrees (=0.03 A(-1) at E(kin,e)=36 eV). Used in a pump-probe configuration, the described experimental setup represents a powerful experimental tool for studying the femtosecond dynamics of ultrafast surface processes in real time.read more
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Snapshots of non-equilibrium Dirac carrier distributions in graphene
Isabella Gierz,Jesse C. Petersen,Jesse C. Petersen,Matteo Mitrano,Cephise Cacho,Edmond Turcu,Emma Springate,Alexander Stöhr,Axel Kohler,Ulrich Starke,Andrea Cavalleri,Andrea Cavalleri +11 more
TL;DR: In this article, the authors used time and angle-resolved photo-emission spectroscopy with femtosecond extreme-ultraviolet pulses to directly probe the non-equilibrium response of Dirac electrons near the K-point of the Brillouin zone.
Journal ArticleDOI
Snapshots of non-equilibrium Dirac carrier distributions in graphene
Isabella Gierz,Jesse C. Petersen,Jesse C. Petersen,Matteo Mitrano,Cephise Cacho,Edmond Turcu,Emma Springate,Alexander Stöhr,Axel Kohler,Ulrich Starke,Andrea Cavalleri,Andrea Cavalleri +11 more
TL;DR: Time- and angle-resolved photoemission spectroscopy with femtosecond extreme-ultraviolet pulses are used to directly probe the non-equilibrium response of Dirac electrons near the K-point of the Brillouin zone, and no indication of carrier multiplication is found, questioning the applicability of graphene for light harvesting.
Journal ArticleDOI
Time-domain classification of charge-density-wave insulators
S. Hellmann,Timm Rohwer,M. Kalläne,K. Hanff,C. Sohrt,A. Stange,Adra Carr,Margaret M. Murnane,Henry C. Kapteyn,Lutz Kipp,Michael Bauer,Kai Rossnagel +11 more
TL;DR: It is shown that time- and angle-resolved photoemission spectroscopy can directly measure the melting times of electronic order parameters and thus identify-via systematic temporal discrimination of elementary electronic and structural processes-the dominant interaction.
Journal ArticleDOI
The ultrafast X-ray spectroscopic revolution in chemical dynamics
Peter M. Kraus,Michael Zürch,Scott K. Cushing,Scott K. Cushing,Daniel M. Neumark,Daniel M. Neumark,Stephen R. Leone,Stephen R. Leone +7 more
TL;DR: In this article, the authors discuss some of the major achievements in the study of nuclear and electronic dynamics with X-ray pulses produced by high-harmonic, free-electron-laser and synchrotron sources.
Journal ArticleDOI
Angle-resolved photoemission spectroscopy and its application to topological materials
TL;DR: Recently, Angle-Resolved photoemission spectroscopy (ARPES) has emerged as an indispensable experimental probe in the study of topological materials, which have characteristic non-trivial bulk and surface electronic structures that can be directly detected by ARPES as mentioned in this paper.
References
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Journal ArticleDOI
Multiple-harmonic conversion of 1064 nm radiation in rare gases
TL;DR: In this article, the authors reported the observation of very high-order odd harmonics of rare gases at an intensity of about 1013 W cm-2 in the XUV range (32.2 nm).