Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Phase-matched extreme-ultraviolet frequency-comb generation

Porat, Gil ; Heyl, Christoph M. LU ; Schoun, Stephen B. ; Benko, Craig ; Dörre, Nadine ; Corwin, Kristan L. and Ye, Jun (2018) In Nature Photonics 12(7). p.387-391
Abstract

Laser-driven high-order harmonic generation1,2 provides spatially3 and temporally4 coherent tabletop sources of broadband extreme-ultraviolet (XUV) light. These sources typically operate at low repetition rates, frep ≲ 100 kHz, where phase-matched HHG is readily achieved5,6. However, many applications demand the improved counting statistics or frequency-comb precision afforded by high repetition rates, frep > 10 MHz. Unfortunately, at such high frep, phase matching is prevented by steady-state plasma accumulated in the generation volume7–11, strongly limiting the XUV average power. Here, we use high-temperature gas mixtures as the generation... (More)

Laser-driven high-order harmonic generation1,2 provides spatially3 and temporally4 coherent tabletop sources of broadband extreme-ultraviolet (XUV) light. These sources typically operate at low repetition rates, frep ≲ 100 kHz, where phase-matched HHG is readily achieved5,6. However, many applications demand the improved counting statistics or frequency-comb precision afforded by high repetition rates, frep > 10 MHz. Unfortunately, at such high frep, phase matching is prevented by steady-state plasma accumulated in the generation volume7–11, strongly limiting the XUV average power. Here, we use high-temperature gas mixtures as the generation medium to increase the gas translational velocity, thereby reducing the steady-state plasma in the laser focus. This allows phase-matched XUV emission inside a femtosecond enhancement cavity at frep = 77 MHz, enabling a record generated power of ~ 2 mW in a single harmonic order. This power scaling opens up many demanding applications, including XUV frequency-comb spectroscopy12,13 of few-electron atoms and ions for precision tests of fundamental physical laws and constants14–20.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nature Photonics
volume
12
issue
7
pages
387 - 391
publisher
Nature Publishing Group
external identifiers
  • scopus:85048680331
ISSN
1749-4885
DOI
10.1038/s41566-018-0199-z
language
English
LU publication?
yes
id
91937694-b2a8-4cc5-aa5e-01a39c47c01b
date added to LUP
2018-06-28 13:15:50
date last changed
2025-04-04 13:57:31
@article{91937694-b2a8-4cc5-aa5e-01a39c47c01b,
  abstract     = {{<p>Laser-driven high-order harmonic generation<sup>1,2</sup> provides spatially<sup>3</sup> and temporally<sup>4</sup> coherent tabletop sources of broadband extreme-ultraviolet (XUV) light. These sources typically operate at low repetition rates, f<sub>rep</sub> ≲ 100 kHz, where phase-matched HHG is readily achieved<sup>5,6</sup>. However, many applications demand the improved counting statistics or frequency-comb precision afforded by high repetition rates, f<sub>rep</sub> &gt; 10 MHz. Unfortunately, at such high f<sub>rep</sub>, phase matching is prevented by steady-state plasma accumulated in the generation volume<sup>7–11</sup>, strongly limiting the XUV average power. Here, we use high-temperature gas mixtures as the generation medium to increase the gas translational velocity, thereby reducing the steady-state plasma in the laser focus. This allows phase-matched XUV emission inside a femtosecond enhancement cavity at f<sub>rep</sub> = 77 MHz, enabling a record generated power of ~ 2 mW in a single harmonic order. This power scaling opens up many demanding applications, including XUV frequency-comb spectroscopy<sup>12,13</sup> of few-electron atoms and ions for precision tests of fundamental physical laws and constants<sup>14–20</sup>.</p>}},
  author       = {{Porat, Gil and Heyl, Christoph M. and Schoun, Stephen B. and Benko, Craig and Dörre, Nadine and Corwin, Kristan L. and Ye, Jun}},
  issn         = {{1749-4885}},
  language     = {{eng}},
  number       = {{7}},
  pages        = {{387--391}},
  publisher    = {{Nature Publishing Group}},
  series       = {{Nature Photonics}},
  title        = {{Phase-matched extreme-ultraviolet frequency-comb generation}},
  url          = {{http://dx.doi.org/10.1038/s41566-018-0199-z}},
  doi          = {{10.1038/s41566-018-0199-z}},
  volume       = {{12}},
  year         = {{2018}},
}