skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Bright high-repetition-rate source of narrowband extreme-ultraviolet harmonics beyond 22 eV

Abstract

Novel table-top sources of extreme-ultraviolet light based on high-harmonic generation yield unique insight into the fundamental properties of molecules, nanomaterials or correlated solids, and enable advanced applications in imaging or metrology. Extending high-harmonic generation to high repetition rates portends great experimental benefits, yet efficient extreme-ultraviolet conversion of correspondingly weak driving pulses is challenging. In this article, we demonstrate a highly-efficient source of femtosecond extreme-ultraviolet pulses at 50-kHz repetition rate, utilizing the ultraviolet second-harmonic focused tightly into Kr gas. In this cascaded scheme, a photon flux beyond ≈3 × 10 13 s -1 is generated at 22.3 eV, with 5 × 10 -5 conversion efficiency that surpasses similar harmonics directly driven by the fundamental by two orders-of-magnitude. The enhancement arises from both wavelength scaling of the atomic dipole and improved spatio-temporal phase matching, confirmed by simulations. Finally, spectral isolation of a single 72-meV-wide harmonic renders this bright, 50-kHz extreme-ultraviolet source a powerful tool for ultrafast photoemission, nanoscale imaging and other applications.

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [1];  [1]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1241159
Report Number(s):
LBNL-6710E
Journal ID: ISSN 2041-1723
DOE Contract Number:  
AC02-05CH11231
Resource Type:
Journal Article
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 6; Related Information: Journal Publication Date: 2015; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 47 OTHER INSTRUMENTATION; 36 MATERIALS SCIENCE; femtosecond lasers; extreme ultraviolet; high-harmonic generation; photoemission

Citation Formats

Wang, He, Xu, Yiming, Ulonska, Stefan, Robinson, Joseph S., Ranitovic, Predrag, and Kaindl, Robert A. Bright high-repetition-rate source of narrowband extreme-ultraviolet harmonics beyond 22 eV. United States: N. p., 2015. Web. doi:10.1038/ncomms8459.
Wang, He, Xu, Yiming, Ulonska, Stefan, Robinson, Joseph S., Ranitovic, Predrag, & Kaindl, Robert A. Bright high-repetition-rate source of narrowband extreme-ultraviolet harmonics beyond 22 eV. United States. doi:10.1038/ncomms8459.
Wang, He, Xu, Yiming, Ulonska, Stefan, Robinson, Joseph S., Ranitovic, Predrag, and Kaindl, Robert A. Thu . "Bright high-repetition-rate source of narrowband extreme-ultraviolet harmonics beyond 22 eV". United States. doi:10.1038/ncomms8459. https://www.osti.gov/servlets/purl/1241159.
@article{osti_1241159,
title = {Bright high-repetition-rate source of narrowband extreme-ultraviolet harmonics beyond 22 eV},
author = {Wang, He and Xu, Yiming and Ulonska, Stefan and Robinson, Joseph S. and Ranitovic, Predrag and Kaindl, Robert A.},
abstractNote = {Novel table-top sources of extreme-ultraviolet light based on high-harmonic generation yield unique insight into the fundamental properties of molecules, nanomaterials or correlated solids, and enable advanced applications in imaging or metrology. Extending high-harmonic generation to high repetition rates portends great experimental benefits, yet efficient extreme-ultraviolet conversion of correspondingly weak driving pulses is challenging. In this article, we demonstrate a highly-efficient source of femtosecond extreme-ultraviolet pulses at 50-kHz repetition rate, utilizing the ultraviolet second-harmonic focused tightly into Kr gas. In this cascaded scheme, a photon flux beyond ≈3 × 1013 s-1 is generated at 22.3 eV, with 5 × 10-5 conversion efficiency that surpasses similar harmonics directly driven by the fundamental by two orders-of-magnitude. The enhancement arises from both wavelength scaling of the atomic dipole and improved spatio-temporal phase matching, confirmed by simulations. Finally, spectral isolation of a single 72-meV-wide harmonic renders this bright, 50-kHz extreme-ultraviolet source a powerful tool for ultrafast photoemission, nanoscale imaging and other applications.},
doi = {10.1038/ncomms8459},
journal = {Nature Communications},
issn = {2041-1723},
number = ,
volume = 6,
place = {United States},
year = {2015},
month = {6}
}