DUAL-COMB XUV SPECTROSCOPY OF LASER-INDUCED PLASMAS
Abstract
An established route to generate coherent light in the extreme-ultraviolet (XUV) is through high-harmonic generation (HHG), where ultra-short and high-power laser systems in the visible and infrared are up-converted to the XUV. These sources have opened up new experimental possibilities in attosecond science and precision spectroscopy, providing critical insights to our understanding of atomic, molecular, and condensed matter systems. For high-resolution studies, groups have demonstrated the technology to generate fs frequency combs in the XUV. However, experiments using a single frequency comb in the XUV have been limited to relatively simple, isolated transitions due to the structure of the comb spectrum. Dual-comb spectroscopy (DCS), which can be viewed as a specialized form of Fourier-transform spectroscopy, does not have these limitations, but has so far only been demonstrated at UV to mid-infrared wavelengths. Over the past several years we have developed a novel XUV dual-comb source. This source will soon enable DCS from the UV into the XUV for the first time, opening the way to novel spectroscopic and time-resolved studies. The broader goal of this research effort is to explore the limits to precision and accuracy that can be achieved utilizing DCS in the XUV for the first time. A component of this work will utilize laser-induced plasma’s (LIP’s). LIP’s will provide a unique tool for spectroscopy of solid materials, simplified sample preparation of atomic, ionic, and molecular species, and plasma characterization, as well as studying related chemical processes that take place in plasma-like environments. Finally, we will utilize the unique dual-comb system itself to probe the microscopic physics of HHG and characterize fundamental processes that can impact the coherence of the XUV dual-comb, and ultimately limit its performance as a high-resolution spectroscopic tool.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 12, 2021
- Source ID
- FA95502010273
Entities
People
- R. Jason Jones
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of Arizona