In situ high-harmonic microscopy of a nanostructured solid
Abstract
Nanostructured optical surfaces allow exquisite control over linear and nonlinear light interactions, where the surface actively creates new frequencies up to high-order harmonics of an intense infrared driving laser field. The function and performance of these surfaces depend sensitively on the distribution of the high-harmonic fields in and between the nanostructured elements, as the high-harmonic wavelength becomes comparable to the nanoscale features of the surface. Imaging the nonlinear response at the active surface with nanometer resolution would greatly benefit the optimization of the metasurface's function. Here we demonstrate an approach to lensless imaging of extreme ultraviolet high harmonics that resolves the amplitude and phase of nonlinear polarization at the active nanostructured surface of an MgO crystal. Imaging the near-field distribution of high harmonics is the gateway to optimized functional high-harmonic metasurfaces and the integration of high harmonics on a chip.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 19, 2023
- Source ID
- 10.1364/optica.488545
Entities
People
- Aleksey Korobenko
- Andrei Yu. Naumov
- David A Reis
- David M. Villeneuve
- Giulio Vampa
- Paul Corkum
- Pierre Berini
- Sabaa Rashid
Organizations
- Air Force Office of Scientific Research
- Defense Threat Reduction Agency
- Natural Sciences and Engineering Research Council
- SLAC National Accelerator Laboratory
- University of Ottawa
- W. M. Keck Foundation