4.7 Article

In-Situ Nanoscale Focusing of Extreme Ultraviolet Solid-State High Harmonics

Journal

PHYSICAL REVIEW X
Volume 12, Issue 4, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevX.12.041036

Keywords

-

Funding

  1. W. M. Keck Foundation
  2. Alexander von Humboldt foundation
  3. Joint Center for Extreme Photonics
  4. U.S. Defense Threat Reduction [1-19-1-0026]
  5. U.S. Air Force Office of Scientific Research [FA9550-16-1-0109]
  6. Natural Sciences and Engineering Research Council of Canada

Ask authors/readers for more resources

This study successfully focuses extreme ultraviolet light to a waist radius of 150 nm, with 18% focusing efficiency, by integrating coherent short-wavelength high-order harmonics with a high-numerical-aperture nanostructured focusing element. Future developments may lead to nanoscale laser ablation and miniaturization of extreme ultraviolet coherent sources on a chip.
Extreme ultraviolet light delivering radiation with a wavelength shorter than approximately 100 nm is now available from solid-state sources. However, despite exceptional progress, efficient focusing of extreme ultraviolet photons to their ultimate diffraction limit remains a formidable challenge because of the precision of the focusing by curved, optical surfaces. Here we integrate coherent short-wavelength highorder harmonics from a MgO crystal, with a high-numerical-aperture, nanostructured, focusing element etched onto the surface of the crystal itself. We focus extreme ultraviolet light, seventh harmonic of an 800-nm laser, with a zone plate of numerical aperture 0.35, down to a waist radius of 150 nm, with 18% focusing efficiency. The estimated intensity approaches 107 W/cm2. Future developments may demonstrate nanoscale laser ablation and miniaturization of extreme ultraviolet coherent sources on a chip.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available