Accession Number:
ADA619293
Title:
Generation of Bright Phase-matched Circularly-polarized Extreme Ultraviolet High Harmonics
Descriptive Note:
Journal article
Corporate Author:
COLORADO UNIV AT BOULDER DEPT OF PHYSICS
Personal Author(s):
Report Date:
2014-12-08
Pagination or Media Count:
17.0
Abstract:
Circularly-polarized extreme ultraviolet and X-ray radiation is useful for analysing the structural, electronic and magnetic properties of materials. To date, such radiation has only been available at large-scale X-ray facilities such as synchrotrons. Here, we demonstrate the first bright, phase-matched, extreme ultraviolet circularly-polarized high harmonics source. The harmonics are emitted when bi-chromatic counter-rotating circularly-polarized laser pulses field-ionize a gas in a hollow-core waveguide. We use this new light source for magnetic circular dichroism measurements at the M shell absorption edges of Co. We show that phase-matching of circularly-polarized harmonics is unique and robust, producing a photon fl ux comparable to linearly polarized high harmonic sources. This work represents a critical advance towards the development of table-top systems for element-specific imaging and spectroscopy of multiple elements simultaneously in magnetic and other chiral media with very high spatial and temporal resolution.
Descriptors:
- *BRIGHTNESS
- *HARMONICS
- *PHOTONICS
- *POLARIZATION
- ABSORPTION
- BANDWIDTH
- CIRCULAR
- COMPUTERIZED SIMULATION
- COUPLING(INTERACTION)
- DIFFRACTION ANALYSIS
- ELECTROMAGNETIC PROPERTIES
- ELECTRONICS
- EXPERIMENTAL DESIGN
- GASES
- INTERACTIONS
- LASER BEAMS
- LIGHT SOURCES
- LINEARITY
- MAGNETIC MATERIALS
- MAGNETIC PROPERTIES
- NONLINEAR SYSTEMS
- PHOTOELECTRON SPECTRA
- SPATIAL DISTRIBUTION
- SPECTROSCOPY
- ULTRAVIOLET RADIATION
- WAVEGUIDES
- X RAYS
Subject Categories:
- Electricity and Magnetism
- Atomic and Molecular Physics and Spectroscopy
- Optics
- Solid State Physics